Utah: Individual County Chronologies

Utah Atlas of Historical County Boundaries

John H. Long, Editor; Peggy Tuck Sinko, Associate Editor and Utah Historical Compiler; Brandon Plewe, Utah Historical Compiler; John P. Ford, Nevada and Utah Historical Compiler; Douglas Knox, Book Digitizing Director; Emily Kelley, Research Associate and Digital Compiler; Laura Rico-Beck, GIS Specialist and Digital Compiler; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant

Copyright The Newberry Library 2008

BEAVER

05 Jan 1856
BEAVER created by Utah Territory from IRON; BEAVER included parts of present Utah, Colorado, and Nevada. (Utah Terr. Laws 1855, 5th sess., sec. 9/p. 7)
18 Jan 1861
BEAVER lost to HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
28 Feb 1861
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory. BEAVER lost to Colorado Territory and was eliminated from present Colorado. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177; Van Zandt, 141)
17 Jan 1862
BEAVER gained from MILLARD, SANPETE, and ST. MARY'S (Utah Territory, extinct). (Utah Terr. Laws 1861, 11th sess., sec. 3/p. 47)
14 Jul 1862
BEAVER lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
16 Jan 1865
BEAVER lost to creation of PIUTE. (Utah Terr. Laws 1864, 14th sess., p. 16)
10 Jan 1866
BEAVER boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 4/p. 207)
05 May 1866
BEAVER lost to the state of Nevada when Nevada gained from Utah Territory; BEAVER eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
01 Jan 1883
BEAVER boundary with IRON was adjusted to run on public land survey lines [no mappable change]. Act passed 9 March 1882; took effect 1 January 1883. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
04 Jan 1896
BEAVER became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

BOX ELDER

05 Jan 1856
BOX ELDER created by Utah Territory from WEBER. (Utah Terr. Laws 1855, 5th sess., sec. 6/pp. 6-7)
17 Jan 1862
BOX ELDER gained all of GREASEWOOD (Utah Territory, extinct) and MALAD (Utah Territory, extinct); gained from DESERT (Utah Territory, extinct), TOOELE, ST. MARY'S (Utah Territory, extinct), and WEBER; lost to CACHE, and lost islands in Great Salt Lake that were attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes." BOX ELDER included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 11th sess., sec. 12/p. 49)
14 Jul 1862
BOX ELDER lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
10 Jan 1866
BOX ELDER boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 16/p. 209)
05 May 1866
BOX ELDER lost to the state of Nevada when Nevada gained from Utah Territory; BOX ELDER eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
18 Feb 1880
BOX ELDER gained part of the islands and waters of Great Salt Lake that had previously been attached to SALT LAKE, and gained from WEBER. (Utah Terr. Laws 1880, 24th sess., ch. 14, sec. 4/pp. 16-17)
04 Jan 1896
BOX ELDER became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

CACHE

05 Jan 1856
CACHE created by Utah Territory from SUMMIT and WEBER; CACHE included territory in present Utah and Wyoming. CACHE not fully organized. (Utah Terr. Laws 1855, 5th sess., sec. 5/p. 6)
04 Apr 1857
CACHE fully organized. (Ricks, 90)
17 Jan 1862
CACHE gained from BOX ELDER and SUMMIT, exchanged with GREEN RIVER (Utah Territory, extinct). (Utah Terr. Laws 1861, 11th sess., sec. 16/p. 50)
16 Jan 1864
CACHE lost to creation of RICHLAND (now RICH); CACHE eliminated from present Wyoming. (Utah Terr. Laws 1863, 13th sess., pp. 18-19)
10 Jan 1866
CACHE boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 20/p. 209)
04 Jan 1896
CACHE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

CARBON

08 Mar 1894
CARBON created by Utah Territory from EMERY. (Utah Terr. Laws 1894, 31st sess., ch. 58, pp. 82-83)
04 Jan 1896
CARBON became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

CARSON (Utah Terr., extinct)

17 Jan 1854
CARSON (Utah Territory, extinct) created by Utah Territory from IRON, JUAB, MILLARD, and TOOELE; CARSON not fully organized, attached to MILLARD "for election, revenue, and judicial purposes." CARSON was located entirely in present Nevada. (Utah Terr. Laws 1853, 3rd sess., p. 19)
02 Oct 1855
CARSON (Utah Territory, extinct) fully organized; detached from MILLARD. (History of Nevada, 38)
05 Jan 1856
CARSON (Utah Territory, extinct) gained from DESERT (Utah Territory, extinct) and WEBER. (Utah Terr. Laws 1855, 5th sess., sec. 1/p. 5)
14 Jan 1857
CARSON (Utah Territory, extinct) was disorganized and attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes." (Utah Terr. Laws 1856, 6th sess., pp. 11-14)
17 Jan 1859
CARSON (Utah Territory, extinct) was reorganized and detached from GREAT SALT LAKE (now SALT LAKE). HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct) detached from TOOELE, attached to CARSON "for election, revenue and judicial purposes." (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
18 Jan 1861
CARSON (Utah Territory, extinct) boundaries were redefined [no change]. (Utah Terr. Laws 1861, 10th sess., p. 19)
02 Mar 1861
The United States created Nevada Territory from Utah Territory; CARSON (Utah Territory) eliminated. (U.S. Stat., vol. 12, ch. 83[1861], pp. 209-210; Van Zandt, 158-160)

CEDAR (Utah Terr., extinct)

05 Jan 1856
CEDAR (Utah Territory, extinct) created by Utah Territory from UTAH. (Utah Terr. Laws 1855, 5th sess., sec. 8/p. 7)
17 Jan 1862
CEDAR (Utah Territory) lost all territory to GREAT SALT LAKE (now SALT LAKE), JUAB, TOOELE, and UTAH; CEDAR eliminated. (Utah Terr. Laws 1861, 11th sess., secs. 6-7, 9, 13/pp. 47-49)

DAGGETT

07 Jan 1918
DAGGETT created from SUMMIT and UINTAH; voters approved the creation in July 1917 election. Creation took effect 7 January 1918. (HRS Utah, Daggett, 11-12; Dunham and Dunham, 319)
1919
DAGGETT lost to UINTAH. (HRS Utah, Daggett, 12, 15; HRS Utah, Uintah, 14, 52)
11 May 1943
DAGGETT boundaries were clarified and placed on public land survey lines [no mappable change]. (Utah Laws 1943, 25th sess., ch. 28, pp. 28-29)

DAVIS

05 Oct 1850
DAVIS created by the state of Deseret from GREAT SALT LAKE (now SALT LAKE) and WEBER. (Morgan, 54-55, 152-153)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including DAVIS, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
03 Mar 1852
DAVIS boundaries redefined by Utah Territory. DAVIS gained from GREAT SALT LAKE (now SALT LAKE), lost to WEBER. (Utah Terr. Laws 1851, 1st sess., sec. 2/p. 162)
13 Jan 1854
DAVIS gained from GREEN RIVER (Utah Territory, extinct). (Utah Terr. Laws 1853, 3d sess., pp. 14-15)
10 Jan 1855
DAVIS gained from WEBER, lost to GREAT SALT LAKE (now SALT LAKE). (Utah Terr. Laws 1854, 4th sess., ch. 85/pp. 279-280)
17 Jan 1862
DAVIS lost to GREAT SALT LAKE (now SALT LAKE) and SUMMIT, and lost to creation of MORGAN. (Utah Terr. Laws 1861, 11th sess., sec. 10/p. 49)
10 Jan 1866
DAVIS boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 14/pp. 208-209)
18 Feb 1880
DAVIS gained part of the islands and waters of Great Salt Lake that had previously been attached to SALT LAKE. (Utah Terr. Laws 1880, 24th sess., ch. 14, sec. 2/p. 16)
04 Jan 1896
DAVIS became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

Deseret (State of Deseret)

12 Mar 1849
Mormon leaders organized a government, and settlers voted this date to form the state of Deseret. (Brown, Cannon, and Jackson, 90-91)
02 Jul 1849
The General Assembly of the newly proposed state of Deseret met on 2 July 1849. The large state was to include almost all of Utah and parts of present Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, and Wyoming, but this proposal never gained widespread support in the U.S. Congress. (Atlas of Utah, 160-161; Brown, Cannon, and Jackson, 90-91; Swindler, 9:375-381)
31 Jan 1850
The state of Deseret lost non-county area to creation of GREAT SALT LAKE (now SALT LAKE), LITTLE SALT LAKE (now IRON), SANPETE, TUILLA (now TOOELE), UTAH, and WEBER. (Morgan, 47-48, 144-145)
03 Dec 1850
The state of Deseret lost non-county area to IRON. (Morgan, 56-57, 157)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)

DESERT (Utah Terr., extinct)

03 Mar 1852
DESERT (Utah Territory, extinct) created by Utah Territory from non-county area and TOOELE; DESERT included parts of present Utah and Nevada. DESERT not fully organized, attached to WEBER "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., sec. 3/p. 162)
05 Jan 1856
DESERT (Utah Territory, extinct) lost to CARSON (Utah Territory, extinct), and lost to creation of HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct). DESERT eliminated from Nevada. (Utah Terr. Laws 1855, 5th sess., secs. 1-3/pp. 5-6)
18 Jan 1861
DESERT (Utah Territory, extinct) gained from ST. MARY'S (Utah Territory, extinct); DESERT included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
DESERT (Utah Territory) lost all territory to BOX ELDER and TOOELE; DESERT eliminated. (Utah Terr. Laws 1861, 11th sess., secs. 12-13/p. 49)

DUCHESNE

04 Jan 1915
DUCHESNE created from WASATCH. Referendum held 13 July 1914; governor's proclamation took effect 4 January 1915. (Utah Laws 1913, 10th sess., ch. 28/pp. 35-38; Stout, 2: 361)
05 Mar 1917
DUCHESNE gained from UINTAH. (Utah Laws 1917, 12th sess., ch. 34, pp. 102-104)
10 May 1977
DUCHESNE boundaries were clarified [no change]. (Utah Laws 1977, 42d leg., 1st sess., ch. 67, pp. 306-308)

EMERY

12 Feb 1880
EMERY created by Utah Territory from SANPETE, SEVIER, and a narrow strip of PIUTE. (Utah Terr. Laws 1880, 24th sess., ch. 4/pp. 4-5)
17 Feb 1880
EMERY gained from PIUTE, SANPETE, and SEVIER. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
13 Mar 1890
EMERY lost to creation of GRAND, and lost to SANPETE. (Utah Terr. Laws 1890, 29th sess., chs. 60-61, pp. 92-94)
08 Mar 1894
EMERY lost to creation of CARBON. (Utah Terr. Laws 1894, 31st sess., ch. 58, pp. 82-83)
04 Jan 1896
EMERY became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
18 Mar 1911
EMERY boundaries were redefined [no change]. (Utah Laws 1911, 9th sess., ch. 80, p. 115)
01 Jan 2003
EMERY gained an area in the city of Green River from GRAND. (Utah State Bulletin, No. 19, 1 Oct. 2002, pp. 1-2; Utah State Bulletin, No. 2, 15 Jan. 2003, p. 2)

GARFIELD

09 Mar 1882
GARFIELD created by Utah Territory from IRON. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
01 Jan 1883
GARFIELD boundary with KANE was adjusted to run on public land survey lines [not mapped]. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
13 Mar 1884
GARFIELD gained from IRON. (Utah Terr. Laws 1884, 26th sess., ch. 40, p. 58)
04 Jan 1896
GARFIELD became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

GRAND

13 Mar 1890
GRAND created by Utah Territory from EMERY. (Utah Terr. Laws 1890, 29th sess., ch. 60, pp. 92-93)
27 Feb 1892
GRAND gained from UINTAH. (Utah Terr. Laws 1892, 30th sess., ch. 16, p. 16)
04 Jan 1896
GRAND became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
23 Mar 1901
Legislature authorized GRAND to gain all of SAN JUAN, dependent on local referendum. Referendum failed at election held in 1901; change did not take effect. (Utah Laws 1901, 4th sess., ch. 120, pp. 128-129; McPherson, 319-320)
28 May 1962
Utah Supreme Court ruled against GRAND and confirmed that the boundary between SAN JUAN and GRAND was 38 degrees, 30 minutes north latitude. GRAND contended the boundary was the south line of township 26 south [no change]. ("San Juan Co. v. Grand County," in Utah Rpts., 2d ser., vol. 13:242-246)
01 Jan 2003
GRAND lost an area in the city of Green River to EMERY. (Utah State Bulletin, No. 19, 1 Oct. 2002, pp. 1-2; Utah State Bulletin, No. 2, 15 Jan. 2003, p. 2)

GREASEWOOD (Utah Terr., extinct)

05 Jan 1856
GREASEWOOD (Utah Territory, extinct) created by Utah Territory from WEBER. GREASEWOOD not fully organized, attached to MALAD (Utah Territory, extinct) "for election, revenue, and judicial purposes." (Utah Terr. Laws 1855, 5th sess., sec. 4/p. 6 and p. 8)
18 Jan 1861
GREASEWOOD (Utah Territory, extinct) gained from ST. MARY'S (Utah Territory, extinct); GREASEWOOD included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
GREASEWOOD (Utah Territory) lost all territory to BOX ELDER; GREASEWOOD eliminated. (Utah Terr. Laws 1861, 11th sess., sec. 12/p. 49)

GREAT SALT LAKE (see SALT LAKE)

GREEN RIVER (Utah Terr., extinct)

03 Mar 1852
GREEN RIVER (Utah Territory, extinct) created by Utah Territory from non-county area; included parts of present Utah, Colorado, and Wyoming. GREEN RIVER not fully organized, attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., sec. 4/pp. 162-163)
13 Jan 1854
GREEN RIVER (Utah Territory, extinct) gained from GREAT SALT LAKE (now SALT LAKE), SANPETE, and UTAH; lost to DAVIS and lost to creation of SUMMIT. (Utah Terr. Laws 1853, 3d sess., pp. 14-15)
15 Jun 1854
GREEN RIVER (Utah Territory, extinct) fully organized, detached from GREAT SALT LAKE (now SALT LAKE). (Gowans and Campbell, 63)
22 Dec 1857
GREEN RIVER (Utah Territory, extinct) was disorganized and attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes" because most settlers had left the area. (Utah Terr. Laws 1857, 7th sess., p. 1)
17 Jan 1859
GREEN RIVER (Utah Territory, extinct) was reorganized, detached from GREAT SALT LAKE (now SALT LAKE). (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
28 Feb 1861
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory. GREEN RIVER (Utah Territory, extinct) lost to Colorado Territory and was eliminated from present Colorado. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177)
02 Mar 1861
GREEN RIVER (Utah Territory, extinct) lost to Nebraska Territory when Nebraska Territory gained area in present Wyoming from Utah Territory. (U.S. Stat., vol. 12, ch. 86[1861]/pp. 239-244; Van Zandt, 134, 136-137)
17 Jan 1862
GREEN RIVER (Utah Territory, extinct) exchanged with CACHE and SUMMIT, lost to SANPETE, and lost to creation of WASATCH. (Utah Terr. Laws 1861, 11th sess., sec. 17/p. 50)
10 Jan 1866
GREEN RIVER (Utah Territory, extinct) boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 22/p. 209)
25 Jul 1868
The United States created Wyoming Territory from Dakota, Idaho, and Utah Territories. GREEN RIVER (Utah Territory, extinct) lost to Wyoming Territory and was eliminated from present Wyoming. (U.S. Stat., vol. 15, ch. 235[1868], secs. 1, 17/pp. 178, 183; Van Zandt, 136, 144)
16 Feb 1872
GREEN RIVER (Utah Territory) lost all territory to SUMMIT; GREEN RIVER eliminated. (Utah Terr. Laws 1872, 20th sess., ch. 19, sec. 1/p. 28)

HUMBOLDT (Utah Terr., extinct)

05 Jan 1856
HUMBOLDT (Utah Territory, extinct) created by Utah Territory from DESERT (Utah Territory, extinct), JUAB, TOOELE, and WEBER; HUMBOLDT was located entirely in present Nevada. HUMBOLDT not fully organized, attached to TOOELE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1855, 5th sess., sec. 2/pp. 5-6 and p. 8)
17 Jan 1859
HUMBOLDT (Utah Territory, extinct) detached from TOOELE, attached to CARSON (Utah Territory, extinct) "for election, revenue and judicial purposes." (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
18 Jan 1861
HUMBOLDT (Utah Territory, extinct) gained from BEAVER, IRON, MILLARD, and WASHINGTON; HUMBOLDT remained attached to CARSON (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
02 Mar 1861
The United States created Nevada Territory from Utah Territory; HUMBOLDT (Utah Territory) eliminated. (U.S. Stat., vol. 12, ch. 83[1861], pp. 209-210; Van Zandt, 158-160)

IRON

31 Jan 1850
LITTLE SALT LAKE (now IRON) created by the state of Deseret to cover Little Salt Lake Valley; LITTLE SALT LAKE not fully organized. (Morgan, 47-48, 145)
03 Dec 1850
LITTLE SALT LAKE renamed IRON, and gained non-county area in the state of Deseret. (Morgan, 56-57, 157)
17 Jan 1851
IRON fully organized. (Dalton, 27-28)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including IRON, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
03 Mar 1852
IRON boundaries redefined by Utah Territory. IRON gained non-county area, lost to creation of WASHINGTON; IRON included parts of present Utah, Colorado, and Nevada. WASHINGTON not fully organized, attached to IRON "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., secs. 12-13/p. 164)
17 Jan 1854
IRON lost to creation of CARSON (Utah Territory, extinct). (Utah Terr. Laws 1853, 3d sess., p. 19)
05 Jan 1856
IRON lost to creation of BEAVER, and lost to WASHINGTON when its southern boundary was shifted slightly from 30 degrees, 30 minutes north latitude to four miles north of Fort Harmony. (Utah Terr. Laws 1855, 5th sess., secs. 9-10/p. 7)
23 Feb 1856
WASHINGTON fully organized, detached from IRON. (Larson, 26)
18 Jan 1861
IRON lost to HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
28 Feb 1861
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory. IRON lost to Colorado Territory and was eliminated from present Colorado. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177; Van Zandt, 141)
17 Jan 1862
IRON gained from ST. MARY'S (Utah Territory, extinct) and WASHINGTON. (Utah Terr. Laws 1861, 11th sess., sec. 2/p. 46)
14 Jul 1862
IRON lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
10 Jan 1866
IRON lost to WASHINGTON. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 3/p. 207)
05 May 1866
IRON lost to the state of Nevada when Nevada gained from Utah Territory; IRON eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
17 Feb 1880
IRON lost to creation of SAN JUAN. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
09 Mar 1882
IRON lost to creation of GARFIELD. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
01 Jan 1883
IRON gained from KANE, exchanged with WASHINGTON. Boundary with BEAVER was adjusted to run on public land survey lines [no mappable change]. Act passed 9 March 1882; took effect 1 January 1883. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
13 Mar 1884
IRON lost to GARFIELD. (Utah Terr. Laws 1884, 26th sess., ch. 40, p. 58)
10 Mar 1892
IRON gained from WASHINGTON. (Utah Terr. Laws 1892, 30th sess., ch. 45, p. 47)
04 Jan 1896
IRON became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
08 May 1917
IRON boundaries were clarified [no change]. (Utah Laws 1917, 12th sess., ch. 78, pp. 226-227)

Jefferson Territory

24 Oct 1859
Voters in the area of present Colorado approved creation of the Territory of Jefferson and authorized formation of a provisional government. The first session of the Jefferson Territorial Legislature met 7 November 1859 in Denver City. This extralegal territory was not recognized by the United States. The Territory of Jefferson included all of present Colorado and parts of present Nebraska, Wyoming, and Utah. (Smiley, 305-318)
28 Nov 1859
The extralegal Territory of Jefferson created 12 counties covering parts of present Colorado, Nebraska, Utah, and Wyoming. Map depicts non-county area of the Territory of Jefferson in Utah Territory. (Jefferson Terr. Laws 1859, 1st sess., pp. 190-192)
06 Jun 1861
Robert W. Steele, Provisional Governor of the Territory of Jefferson, declared the Territory disbanded upon the arrival of William Gilpin, the new territorial governor of Colorado. (Smiley, 321-322)

JUAB

03 Mar 1852
JUAB created by Utah Territory from UTAH and non-county area; JUAB included parts of present Utah and Nevada. (Utah Terr. Laws 1851, 1st sess., sec. 9/p. 163)
17 Jan 1854
JUAB lost to creation of CARSON (Utah Territory, extinct). (Utah Terr. Laws 1853, 3rd sess., p. 19)
18 Jan 1855
JUAB exchanged with SANPETE. (Utah Terr. Laws 1854, 4th sess., ch. 81/pp. 276-277)
05 Jan 1856
JUAB lost to creation of HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct); JUAB eliminated from Nevada. (Utah Terr. Laws 1855, 5th sess., secs. 2-3/ pp. 5-6)
18 Jan 1861
JUAB gained from ST. MARY'S (Utah Territory, extinct); JUAB included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
JUAB gained small areas from CEDAR (Utah Territory, extinct) and SHAMBIP (Utah Territory, extinct); exchanged with MILLARD; lost to TOOELE and UTAH. (Utah Terr. Laws 1861, 11th sess., sec. 6/pp. 47-48)
10 Jan 1866
JUAB exchanged small areas with SANPETE, lost to MILLARD. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 8/p. 208)
21 Feb 1868
JUAB boundary with SANPETE was clarified [no change]. (Utah Terr. Laws 1868, 17th sess., ch. 23/p. 26)
18 Feb 1870
JUAB gained from TOOELE. (Utah Terr. Laws 1870, 19th sess., p. 127)
06 Mar 1888
JUAB gained from MILLARD and gained small area from SANPETE. Boundary with SANPETE was uncertain and ambiguous [line is estimated here]. (Utah Terr. Laws 1888, 28th sess., ch. 29, pp. 44-46)
08 Mar 1894
Boundary between JAUB and TOOELE was adjusted to run on the second standard parallel south [no mappable change]. (Utah Terr. Laws 1894, 31st sess., ch. 35, pp. 31-32)
04 Jan 1896
JUAB became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
19 Mar 1913
JUAB exchanged with SANPETE. Boundary between JUAB and SANPETE was "indefinite and ambiguous to the extent that it has heretofore been impossible definitely to determine the exact direction of said boundary." This law was an attempt to settle the dispute [see 29 December 1916]. Boundary was also adjusted in T13S, R2E [not mapped]. (Utah Laws 1913, 10th sess., ch. 71, pp. 113-115; HRS Utah, Sanpete, 7-10)
29 Dec 1916
The Utah State Supreme Court upheld the 19 March 1913 law that established part of the boundary between JUAB and SANPETE. ("Barton v. Sanpete Co.," in Utah Rpts., 49:188-195)
08 Mar 1919
JUAB exchanged with SANPETE, lost to MILLARD when boundaries were placed on public land survey lines. Boundary with MILLARD west of the Sevier River was adjusted to run on public land survey line [no mappable change]. (Utah Laws 1919, 13th sess., ch. 27, pp. 47-49)

KANE

16 Jan 1864
KANE created by Utah Territory from WASHINGTON. (Utah Terr. Laws 1863, 13th sess., pp. 18-19)
10 Jan 1866
KANE boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 1/p. 207)
01 Aug 1869
KANE gained from WASHINGTON. Act passed 19 February 1869; took effect 1 August 1869. (Utah Terr. Laws 1869, 18th sess., ch. 18/p. 17)
17 Feb 1880
KANE lost to creation of SAN JUAN. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
01 Jan 1883
KANE lost to WASHINGTON and IRON; boundary with GARFIELD was adjusted to run on public land survey lines [not mapped]. Act passed 9 March 1882; took effect 1 January 1883. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
04 Jan 1896
KANE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

LITTLE SALT LAKE (see IRON)

MALAD (Utah Terr., extinct)

05 Jan 1856
MALAD (Utah Territory, extinct) created by Utah Territory from WEBER. GREASEWOOD (Utah Territory, extinct) attached to MALAD "for election, revenue, and judicial purposes." (Utah Terr. Laws 1855, 5th sess., sec. 7/p. 7 and p. 8)
17 Jan 1862
MALAD (Utah Territory) lost all territory to BOX ELDER; MALAD eliminated. (Utah Terr. Laws 1861, 11th sess., sec. 12/p. 49)

MILLARD

04 Oct 1851
MILLARD created by Utah Territory from non-county area in the Pavant Valley. (Utah Terr. Laws 1851, 1st sess., pp. 161-162)
03 Mar 1852
MILLARD boundaries redefined by Utah Territory. MILLARD gained from SANPETE and non-county area; MILLARD included parts of present Utah and Nevada. (Utah Terr. Laws 1851, 1st sess., sec. 10/pp. 163-164)
17 Jan 1854
MILLARD lost to creation of CARSON (Utah Territory, extinct); CARSON not fully organized, attached to MILLARD "for election, revenue, and judicial purposes." (Utah Terr. Laws 1853, 3rd sess., p. 19)
02 Oct 1855
CARSON (Utah Territory, extinct) fully organized; detached from MILLARD. (History of Nevada, 38)
18 Jan 1861
MILLARD lost to HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
MILLARD gained from ST. MARY'S (Utah Territory, extinct), exchanged with JUAB, lost to BEAVER and SANPETE. (Utah Terr. Laws 1861, 11th sess., sec. 4/p. 47)
14 Jul 1862
MILLARD lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
10 Jan 1866
MILLARD gained from JUAB. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 6/p. 208)
05 May 1866
MILLARD lost to the state of Nevada when Nevada gained from Utah Territory; MILLARD eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
06 Mar 1888
MILLARD lost to JUAB. (Utah Terr. Laws 1888, 28th sess., ch. 29, pp. 44-46)
04 Jan 1896
MILLARD became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
08 Mar 1919
MILLARD gained from JUAB, exchanged with SANPETE when boundaries were placed on public land survey lines. Boundary with JUAB west of the Sevier River was adjusted to run on public land survey lines [no mappable change]. (Utah Laws 1919, 13th sess., ch. 27, p. 49)
10 Mar 1921
MILLARD exchanged with SEVIER. (Utah Laws 1921, 14th sess., ch. 33, pp. 104-106)

MORGAN

17 Jan 1862
MORGAN created by Utah Territory from DAVIS, GREAT SALT LAKE (now SALT LAKE), SUMMIT, and WEBER. (Utah Terr. Laws 1861, 11th sess., sec. 15/p. 50)
10 Jan 1866
MORGAN boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 19/p. 209)
04 Jan 1896
MORGAN became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

MOUNTAIN (Jefferson Terr., extinct)

28 Nov 1859
The extralegal Territory of Jefferson created MOUNTAIN (Jefferson Territory, extinct); MOUNTAIN included territory in present Colorado and Utah, and overlapped part of Utah Territory [BEAVER, GREEN RIVER (Utah Territory, extinct), IRON, SANPETE, and WASHINGTON]. (Jefferson Terr. Laws 1859, 1st sess., sec. 12/ p. 192)
06 Jun 1861
Robert W. Steele, Provisional Governor of the Territory of Jefferson, declared the Territory disbanded upon the arrival of William Gilpin, the new territorial governor of Colorado; MOUNTAIN (Jefferson Territory) eliminated. (Smiley, 321-322)

PIUTE

16 Jan 1865
PIUTE created by Utah Territory from BEAVER. (Utah Terr. Laws 1864, 14th sess., p. 16)
10 Jan 1866
PIUTE lost to SEVIER. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 5/p. 207)
12 Feb 1880
PIUTE lost narrow strip of territory to creation of EMERY. (Utah Terr. Laws 1880, 24th sess., ch. 4/pp. 4-5)
17 Feb 1880
PIUTE lost to creation of SAN JUAN and lost to EMERY. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
10 Mar 1892
PIUTE lost to creation of WAYNE. (Utah Terr. Laws 1892, 30th sess., ch. 71, pp. 79-81)
04 Jan 1896
PIUTE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
23 Mar 1931
PIUTE lost to SEVIER when boundary was placed on public land survey lines. (Utah Laws 1931, 19th sess., ch. 47, pp. 163-164)

RICH

16 Jan 1864
RICHLAND (now RICH) created by Utah Territory from CACHE; RICHLAND included territory in present Utah and Wyoming. RICHLAND not fully organized. (Utah Terr. Laws 1863, 13th sess., pp. 18-19)
05 May 1864
RICHLAND (now RICH) fully organized. (Parson, 274)
10 Jan 1866
RICHLAND (now RICH) boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 21/p. 209)
29 Jan 1868
RICHLAND renamed RICH. (Utah Terr. Laws 1868, 17th sess., ch. 2/p. 1)
25 Jul 1868
The United States created Wyoming Territory from Dakota, Idaho, and Utah Territories. RICH lost to Wyoming Territory and was eliminated from present Wyoming. (U.S. Stat., vol. 15, ch. 235[1868], secs. 1, 17/pp. 178, 183; Van Zandt, 136, 144)
16 Feb 1872
RICH gained small area from SUMMIT near town of Wasatch. (Utah Terr. Laws 1872, 20th sess., ch. 25, p. 40)
04 Jan 1896
RICH became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
08 May 1917
RICH gained from SUMMIT [act overturned by Utah Supreme Court; see 19 January 1921]. (Utah Laws 1917, 12th sess., ch. 113, pp. 336-337)
19 Jan 1921
RICH lost to SUMMIT when Utah Supreme Court ruled the act of 8 May 1917 unconstitutional. ("Summit County v. Rich County," in Utah Rpts., 57:553-564)

RICHLAND (see RICH)

RIO VIRGEN (Utah Terr., extinct)

18 Feb 1869
RIO VIRGEN (Utah Territory, extinct) created by Utah Territory from WASHINGTON. Due to lack of geographical knowledge about the precise location of the southwestern boundary of Utah Territory, this county covered only a very small area, which was not the intention of the territorial legislature. (Utah Terr. Laws 1869, 18th sess., ch. 10/p. 7; Atlas of Utah, 163-164)
16 Feb 1872
RIO VIRGEN (Utah Territory) lost all territory to WASHINGTON; RIO VIRGEN eliminated. (Utah Terr. Laws 1872, 20th sess., ch. 19, sec. 2/p. 28)

ST. MARY'S (Utah Terr., extinct)

05 Jan 1856
ST. MARY'S (Utah Territory, extinct) created by Utah Territory from DESERT (Utah Territory, extinct), JUAB, TOOELE, and WEBER. ST MARY'S was located entirely in present Nevada. ST. MARY'S not fully organized, attached to TOOELE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1855, 5th sess., sec. 3/p. 6 and p. 8)
17 Jan 1859
ST. MARY'S (Utah Territory, extinct) detached from TOOELE, attached to CARSON (Utah Territory, extinct) "for election, revenue and judicial purposes." (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
18 Jan 1861
ST. MARY'S (Utah Territory, extinct) gained from BEAVER, IRON, MILLARD, and WASHINGTON; lost to DESERT (Utah Territory, extinct), GREASEWOOD (Utah Territory, extinct), JUAB, SHAMBIP (Utah Territory, extinct), and TOOELE. ST. MARY'S remained attached to CARSON (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
02 Mar 1861
The United States created Nevada Territory from Utah Territory; CARSON (Utah Territory) eliminated, ending attachment of ST. MARY'S (Utah Territory, extinct) to CARSON. (U.S. Stat., vol. 12, ch. 83[1861], pp. 209-210; Van Zandt, 158-160)
17 Jan 1862
ST. MARY'S (Utah Territory) lost all territory to BEAVER, BOX ELDER, IRON, MILLARD, TOOELE, and WASHINGTON; ST. MARY'S eliminated. (Utah Terr. Laws 1861, 11th sess., secs. 1-4, 12-13/pp. 46-49)

SALT LAKE

31 Jan 1850
GREAT SALT LAKE (now SALT LAKE) created by the state of Deseret. TUILLA (now TOOELE) not fully organized, attached to GREAT SALT LAKE "for judicial, revenue, and election purposes." (Morgan, 47-48, 144; HRS Utah, Weber, 9)
05 Oct 1850
GREAT SALT LAKE (now SALT LAKE) lost to creation of DAVIS by the state of Deseret. (Morgan, 54-55, 152-153)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including GREAT SALT LAKE (now SALT LAKE), continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
10 Jun 1851
TOOELE (originally TUILLA) fully organized; detached from GREAT SALT LAKE (now SALT LAKE). (Tooele County Daughters of Utah Pioneers, 24)
03 Mar 1852
GREAT SALT LAKE (now SALT LAKE) boundaries redefined by Utah Territory. GREAT SALT LAKE gained from TOOELE and non-county area; exchanged with UTAH; lost to DAVIS. GREAT SALT LAKE included parts of present Utah and Colorado. GREEN RIVER (Utah Territory, extinct) and Islands in the Great Salt Lake south of WEBER were attached to GREAT SALT LAKE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., secs. 4-6/pp. 162-163)
13 Jan 1854
GREAT SALT LAKE (now SALT LAKE) lost to GREEN RIVER (Utah Territory, extinct) and lost to creation of SUMMIT; GREAT SALT LAKE eliminated from present Colorado. SUMMIT not fully organized, attached to GREAT SALT LAKE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1853, 3d sess./pp. 14-15)
15 Jun 1854
GREEN RIVER (Utah Territory, extinct) fully organized, detached from GREAT SALT LAKE (now SALT LAKE). (Gowans and Campbell, 63)
10 Jan 1855
GREAT SALT LAKE (now SALT LAKE) gained from DAVIS. (Utah Terr. Laws 1854, 4th sess., ch. 85/pp. 279-280)
14 Jan 1857
CARSON (Utah Territory, extinct) was disorganized and attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes." (Utah Terr. Laws 1856, 6th sess., pp. 11-14)
22 Dec 1857
GREEN RIVER (Utah Territory, extinct) was disorganized and attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes" because most settlers had left the area. (Utah Terr. Laws 1857, 7th sess., p. 1)
17 Jan 1859
CARSON (Utah Territory, extinct) and GREEN RIVER (Utah Territory, extinct) were reorganized and detached from GREAT SALT LAKE (now SALT LAKE). (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
04 Mar 1861
SUMMIT fully organized; detached from GREAT SALT LAKE (now SALT LAKE). (Summit County Record Book A, p. 1)
17 Jan 1862
GREAT SALT LAKE (now SALT LAKE) gained from CEDAR (Utah Territory, extinct) and DAVIS; exchanged with UTAH; lost to SUMMIT and TOOELE, and lost to creation of MORGAN and WASATCH. All islands in Great Salt Lake were attached to GREAT SALT LAKE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1861, 11th sess., secs. 9, 18/pp. 48, 50)
10 Jan 1866
GREAT SALT LAKE (now SALT LAKE) boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, secs. 12-13/p. 208)
29 Jan 1868
GREAT SALT LAKE renamed SALT LAKE. (Utah Terr. Laws 1868, 17th sess., ch. 3/p. 2)
18 Feb 1880
SALT LAKE gained part of the islands and waters of Great Salt Lake that had previously been attached to SALT LAKE. (Utah Terr. Laws 1880, 24th sess., ch. 14, sec. 1/pp. 15-16)
04 Jan 1896
SALT LAKE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

SAN JUAN

17 Feb 1880
SAN JUAN created by Utah Territory from IRON, KANE, and PIUTE. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
04 Jan 1896
SAN JUAN became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
23 Mar 1901
Legislature authorized GRAND to gain all of SAN JUAN, dependent on local referendum. Referendum failed at election held in 1901; change did not take effect. (Utah Laws 1901, 4th sess., ch. 120, pp. 128-129; McPherson, 319-320)
28 May 1962
Utah Supreme Court ruled in favor of SAN JUAN and confirmed that the boundary between SAN JUAN and GRAND was 38 degrees, 30 minutes north latitude. GRAND contended the boundary was the south line of township 26 south [no change]. ("San Juan Co. v. Grand County," in Utah Rpts., 2d ser., vol. 13:242-246)

SANPETE

31 Jan 1850
SANPETE created by the state of Deseret to cover the San Pete Valley. (Morgan, 47-48, 144)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including SANPETE, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
03 Mar 1852
SANPETE boundaries redefined by Utah Territory. SANPETE gained non-county area, lost to MILLARD; SANPETE included parts of present Utah and Colorado. (Utah Terr. Laws 1851, 1st sess., sec. 11/p. 164)
13 Jan 1854
SANPETE lost to GREEN RIVER (Utah Territory, extinct). (Utah Terr. Laws 1853, 3d sess., pp. 14-15)
18 Jan 1855
SANPETE exchanged with JUAB. (Utah Terr. Laws 1854, 4th sess., ch. 81/pp. 276-277)
28 Feb 1861
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory. SANPETE lost to Colorado Territory and was eliminated from present Colorado. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177; Van Zandt, 141)
17 Jan 1862
SANPETE gained from GREEN RIVER (Utah Territory, extinct) and MILLARD; exchanged with UTAH; lost to BEAVER, and lost to creation of WASATCH. (Utah Terr. Laws 1861, 11th sess., sec. 5/p. 47)
16 Jan 1865
SANPETE lost to creation of SEVIER. (Utah Terr. Laws 1864, 14th sess., p. 16)
10 Jan 1866
SANPETE exchanged small areas with JUAB. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 9/p. 208)
21 Feb 1868
SANPETE boundary with JUAB was clarified [no change]. (Utah Terr. Laws 1868, 17th sess., ch. 23/p. 26)
12 Feb 1880
SANPETE lost to creation of EMERY. (Utah Terr. Laws 1880, 24th sess., ch. 4/pp. 4-5)
17 Feb 1880
SANPETE lost to EMERY. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
18 Feb 1880
SANPETE lost to creation of UINTAH, and lost to UTAH and WASATCH. (Utah Terr. Laws 1880, 24th sess., chs. 10, 16/pp. 11-12, 18-19)
06 Mar 1888
SANPETE lost small area to JUAB. Boundary with JUAB was uncertain and ambiguous [line is estimated here]. (Utah Terr. Laws 1888, 28th sess., ch. 29, pp. 44-46)
10 Mar 1890
SANPETE gained from SEVIER. (Utah Terr. Laws 1890, 29th sess., ch. 16, pp. 13-14)
13 Mar 1890
SANPETE gained from EMERY. (Utah Terr. Laws 1890, 29th sess., ch. 61, p. 94)
04 Jan 1896
SANPETE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
19 Mar 1913
SANPETE exchanged with JUAB. Boundary between JUAB and SANPETE was "indefinite and ambiguous to the extent that it has heretofore been impossible definitely to determine the exact direction of said boundary." This law was an attempt to settle the dispute [see 29 December 1916]. Boundary was also adjusted in T13S, R2E [not mapped]. (Utah Laws 1913, 10th sess., ch. 71, pp. 113-115; HRS Utah, Sanpete, 7-10)
29 Dec 1916
The Utah State Supreme Court upheld the 19 March 1913 law that established part of the boundary between SANPETE and JUAB. ("Barton v. Sanpete Co.," in Utah Rpts., 49:188-195)
08 Mar 1919
SANPETE exchanged with JUAB and MILLARD when boundaries were placed on public land survey lines. (Utah Laws 1919, 13th sess., ch. 27, pp. 49-50)

SARATOGA (Jefferson Terr., extinct)

28 Nov 1859
The extralegal Territory of Jefferson created SARATOGA (Jefferson Territory, extinct). SARATOGA was located entirely in present Colorado, but overlapped part of Utah Territory [GREEN RIVER (Utah Territory, extinct) and SANPETE]. (Jefferson Terr. Laws 1859, 1st sess., sec. 7, p. 191)
06 Jun 1861
Robert W. Steele, Provisional Governor of the Territory of Jefferson, declared the Territory disbanded upon the arrival of William Gilpin, the new territorial governor of Colorado; SARATOGA (Jefferson Territory) eliminated. Overlap of Utah Territory by SARATOGA ended technically on 28 February 1861 when Utah Territory lost to the creation of Colorado Territory. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177)

SEVIER

16 Jan 1865
SEVIER created by Utah Territory from SANPETE. (Utah Terr. Laws 1864, 14th sess., p. 16)
10 Jan 1866
SEVIER gained from PIUTE. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 7/p. 208)
12 Feb 1880
SEVIER lost to creation of EMERY; SEVIER was temporarily divided into 2 parts. (Utah Terr. Laws 1880, 24th sess., ch. 4/pp. 4-5)
17 Feb 1880
SEVIER lost to EMERY; SEVIER no longer divided into 2 parts. (Utah Terr. Laws 1880, 24th sess., ch. 9/pp. 10-11)
10 Mar 1890
SEVIER lost to SANPETE. (Utah Terr. Laws 1890, 29th sess., ch. 16, pp. 13-14)
04 Jan 1896
SEVIER became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
10 Mar 1921
SEVIER exchanged with MILLARD. (Utah Laws 1921, 14th sess., ch. 33, pp. 104-106)
23 Mar 1931
SEVIER gained from PIUTE when boundary was placed on public land survey lines. (Utah Laws 1931, 19th sess., ch. 47, pp. 163-164)

SHAMBIP (Utah Terr., extinct)

12 Jan 1856
SHAMBIP (Utah Territory, extinct) created by Utah Territory from TOOELE. (Utah Terr. Laws 1855, 5th sess., pp. 7-8)
18 Jan 1861
SHAMBIP (Utah Territory, extinct) gained from ST. MARY'S (Utah Territory, extinct); SHAMBIP included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
SHAMBIP (Utah Territory) lost all territory to TOOELE and a small area to JUAB; SHAMBIP eliminated. (Utah Terr. Laws 1861, 11th sess., secs. 6, 13/pp. 47-49)

SUMMIT

13 Jan 1854
SUMMIT created by Utah Territory from GREEN RIVER (Utah Territory, extinct) and GREAT SALT LAKE (now SALT LAKE); SUMMIT included territory in present Utah and Wyoming. SUMMIT not fully organized, attached to GREAT SALT LAKE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1853, 3d sess., pp. 14-15)
05 Jan 1856
SUMMIT lost to creation of CACHE. (Utah Terr. Laws 1855, 5th sess., sec. 5/p. 6)
04 Mar 1861
SUMMIT fully organized; detached from GREAT SALT LAKE (now SALT LAKE). (Summit County Record Book A, p. 1)
17 Jan 1862
SUMMIT gained from DAVIS and GREAT SALT LAKE (now SALT LAKE); exchanged with GREEN RIVER (Utah Territory, extinct); lost to creation of MORGAN and WASATCH, and lost to CACHE and WEBER. (Utah Terr. Laws 1861, 11th sess., sec. 14/pp. 49-50)
10 Jan 1866
SUMMIT boundaries were clarified [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 18/p. 209)
25 Jul 1868
The United States created Wyoming Territory from Dakota, Idaho, and Utah Territories. SUMMIT lost to Wyoming Territory and was eliminated from present Wyoming. (U.S. Stat., vol. 15, ch. 235[1868], secs. 1, 17/pp. 178, 183; Van Zandt, 136, 144)
16 Feb 1872
SUMMIT gained all of GREEN RIVER (Utah Territory); GREEN RIVER eliminated. SUMMIT lost small area to RICH near town of Wasatch. (Utah Terr. Laws 1872, 20th sess., ch. 19, sec. 1/p. 28 and ch. 25, p. 40)
18 Feb 1880
SUMMIT lost to creation of UINTAH. (Utah Terr. Laws 1880, 24th sess., ch. 10/pp. 11-12)
04 Jan 1896
SUMMIT became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
05 Mar 1917
SUMMIT gained from UINTAH. (Utah Laws 1917, 12th sess., chs. 34, 113/pp. 102-104, 336-337)
08 May 1917
SUMMIT lost to RICH [act overturned by Utah Supreme Court; see 19 January 1921]. Eastern boundary with UINTAH was confirmed. (Utah Laws 1917, 12th sess., ch. 113, pp. 336-337)
07 Jan 1918
SUMMIT lost to creation of DAGGETT. (HRS Utah, Daggett, 11-12; Dunham and Dunham, 319)
19 Jan 1921
SUMMIT gained from RICH when Utah Supreme Court ruled the act of 8 May 1917 unconstitutional. ("Summit County v. Rich County," in Utah Rpts., 57:553-564)

TOOELE

31 Jan 1850
TOOELE (spelled TUILLA here) created by the state of Deseret to cover the Tuilla/Tooele Valley; TUILLA not fully organized, attached to GREAT SALT LAKE (now SALT LAKE) "for judicial, revenue, and election purposes." (Morgan, 47-48, 145)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including TOOELE, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
10 Jun 1851
TOOELE (originally TUILLA) fully organized; detached from GREAT SALT LAKE (now SALT LAKE). (Tooele County Daughters of Utah Pioneers, 24)
03 Mar 1852
TOOELE boundaries were redefined by Utah Territory. TOOELE gained non-county area, lost to DESERT (Utah Territory, extinct), GREAT SALT LAKE (now SALT LAKE), and UTAH; TOOELE included parts of present Utah and Nevada. (Utah Terr. Laws 1851, 1st sess., sec. 8/p. 163)
17 Jan 1854
TOOELE lost to creation of CARSON (Utah Territory, extinct). (Utah Terr. Laws 1853, 3rd sess., p. 19)
05 Jan 1856
TOOELE lost to creation of HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct); TOOELE eliminated from Nevada. HUMBOLDT and ST. MARY'S not fully organized, both attached to TOOELE "for election, revenue, and judicial purposes." (Utah Terr. Laws 1855, 5th sess., secs. 2-3/pp. 5-6 and p. 8)
12 Jan 1856
TOOELE lost to creation of SHAMBIP (Utah Territory, extinct). (Utah Terr. Laws 1855, 5th sess., pp. 7-8)
17 Jan 1859
HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct) detached from TOOELE, both attached to CARSON (Utah Territory, extinct) "for election, revenue and judicial purposes." (Utah Terr. Laws 1858, 8th sess., ch. 11/pp. 19-20)
18 Jan 1861
TOOELE gained from ST. MARY'S (Utah Territory, extinct); TOOELE included territory in present Utah and Nevada. (Utah Terr. Laws 1861, 10th sess., p. 19)
17 Jan 1862
TOOELE gained from CEDAR (Utah Territory, extinct), DESERT (Utah Territory, extinct), GREAT SALT LAKE (now SALT LAKE), JUAB, SHAMBIP (Utah Territory, extinct), and ST. MARY'S (Utah Territory, extinct); lost to BOX ELDER. (Utah Terr. Laws 1861, 11th sess., sec. 13/p. 49)
14 Jul 1862
TOOELE lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
10 Jan 1866
TOOELE boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 17/p. 209)
05 May 1866
TOOELE lost to the state of Nevada when Nevada gained from Utah Territory; TOOELE eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
18 Feb 1870
TOOELE lost to JUAB. (Utah Terr. Laws 1870, 19th sess., p. 127)
18 Feb 1880
TOOELE gained part of the islands and waters of Great Salt Lake that had previously been attached to SALT LAKE. (Utah Terr. Laws 1880, 24th sess., ch. 14, sec. 5/p. 17)
08 Mar 1894
Boundary between TOOELE and JUAB was adjusted to run on the second standard parallel south [no mappable change]. (Utah Terr. Laws 1894, 31st sess., ch. 35, pp. 31-32)
04 Jan 1896
TOOELE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

TUILLA (see TOOELE)

UINTAH

18 Feb 1880
UINTAH created by Utah Territory from SANPETE, SUMMIT, and WASATCH. (Utah Terr. Laws 1880, 24th sess., ch. 10/pp. 11-12)
27 Feb 1892
UINTAH lost to GRAND. (Utah Terr. Laws 1892, 30th sess., ch. 16, p. 16)
04 Jan 1896
UINTAH became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
05 Mar 1917
UNITAH lost to DUCHESNE and SUMMIT. (Utah Laws 1917, 12th sess., ch. 34, pp. 102-104)
07 Jan 1918
UNITAH lost to creation of DAGGETT. (HRS Utah, Daggett, 11-12; Dunham and Dunham, 319)
1919
UINTAH gained from DAGGETT. (HRS Utah, Daggett, 12, 15; HRS Utah, Uintah, 14, 52)
11 May 1943
UNITAH boundaries were clarified and placed on public land survey lines [no mappable change]. (Utah Laws 1943, 25th sess., ch. 28, pp. 29-30)
10 May 1977
UINTAH boundaries were clarified [no change]. (Utah Laws 1977, 42d leg., 1st sess., ch. 67, pp. 306-308)

UTAH

31 Jan 1850
UTAH created by the state of Deseret to cover the Utah Valley. (Morgan, 47-48, 144)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including UTAH, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
03 Mar 1852
UTAH boundaries redefined by Utah Territory. UTAH gained non-county area; exchanged with GREAT SALT LAKE (now SALT LAKE); lost to JUAB and SANPETE; UTAH included parts of present Utah and Colorado. (Utah Terr. Laws 1851, 1st sess., sec. 7/p. 163)
13 Jan 1854
UTAH lost to GREEN RIVER (Utah Territory, extinct); UTAH eliminated from present Colorado. (Utah Terr. Laws 1853, 3d sess., pp. 14-15)
05 Jan 1856
UTAH lost to creation of CEDAR (Utah Territory, extinct). (Utah Terr. Laws 1855, 5th sess., sec. 8/p. 7)
17 Jan 1862
UTAH gained from CEDAR (Utah Territory, extinct) and JUAB; exchanged with GREAT SALT LAKE (now SALT LAKE) and SANPETE; and lost to creation of WASATCH. (Utah Terr. Laws 1861, 11th sess., sec. 7/p. 48)
10 Jan 1866
UTAH boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 10/p. 208)
28 Jan 1869
Eastern boundary of UTAH was clarified [no change]. (Utah Terr. Laws 1869, 18th sess., ch. 1/p. 1)
18 Feb 1880
UTAH gained from SANPETE. (Utah Terr. Laws 1880, 24th sess., ch. 16/pp. 18-19)
13 Mar 1884
UTAH gained from WASATCH. (Utah Terr. Laws 1884, 26th sess., ch. 39, p. 57)
04 Jan 1896
UTAH became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

Utah Territory

09 Sep 1850
The United States created Utah Territory from the territory ceded by Mexico in the Treaty of Guadalupe-Hidalgo (1848), from territory to be purchased from the state of Texas in December 1850, and from unorganized federal territory. Utah Territory included all of present Utah and parts of present Colorado, Nevada, and Wyoming. Governmental functions of the state of Deseret continued. (U.S. Stat., vol. 9, ch. 49[1850]/pp. 446-452 and ch. 51[1850]/pp. 453-458; Van Zandt, 159)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties continued to operate. Map depicts non-county area in Utah Territory. (Brown, Cannon, and Jackson, 90; Powell, 139)
04 Oct 1851
Utah Territory lost non-county area to creation of MILLARD. (Utah Terr. Laws 1851, 1st sess., pp. 161-162)
03 Mar 1852
All non-county area in Utah Territory was eliminated when Utah Territory established 12 counties to cover all areas of the territory. (Utah Terr. Laws 1851, 1st sess., pp. 162-163)

WASATCH

17 Jan 1862
WASATCH created by Utah Territory from GREAT SALT LAKE (now SALT LAKE), GREEN RIVER (Utah Territory, extinct), SANPETE, SUMMIT, and UTAH. (Utah Terr. Laws 1861, 11th sess., sec. 8/p. 48)
10 Jan 1866
WASATCH boundaries were clarified [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 11/p. 208)
18 Feb 1880
WASATCH gained from SANPETE, lost to creation of UINTAH. (Utah Terr. Laws 1880, 24th sess., chs. 10, 16/pp. 11-12, 18-19)
13 Mar 1884
WASATCH lost to UTAH. (Utah Terr. Laws 1884, 26th sess., ch. 39, p. 57)
04 Jan 1896
WASATCH became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
04 Jan 1915
WASATCH lost to creation of DUCHESNE. (Utah Laws 1913, 10th sess., ch. 28/pp. 35-38; Stout, 2: 361)

WASHINGTON

03 Mar 1852
WASHINGTON created by Utah Territory from non-county area and IRON; included parts of present Utah, Colorado, and Nevada. WASHINGTON not fully organized, attached to IRON "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., sec. 13/p. 164)
05 Jan 1856
WASHINGTON gained from IRON all along its northern line when the boundary was shifted slightly from 30 degrees, 30 minutes north latitude to four miles north of Fort Harmony. (Utah Terr. Laws 1855, 5th sess., sec. 10/p. 7)
23 Feb 1856
WASHINGTON fully organized, detached from IRON. (Larson, 26)
18 Jan 1861
WASHINGTON lost to HUMBOLDT (Utah Territory, extinct) and ST. MARY'S (Utah Territory, extinct). (Utah Terr. Laws 1861, 10th sess., p. 19)
28 Feb 1861
The United States created Colorado Territory from Nebraska, New Mexico, and Utah Territories, and from the former Kansas Territory. WASHINGTON lost to Colorado Territory and was eliminated from present Colorado. (U.S. Stat., vol. 12, ch. 59[1861]/pp. 172-177; Van Zandt, 141)
17 Jan 1862
WASHINGTON gained from ST. MARY'S (Utah Territory, extinct), lost to IRON. (Utah Terr. Laws 1861, 11th sess., sec. 1/p. 46)
14 Jul 1862
WASHINGTON lost to Nevada Territory in present Nevada when Nevada Territory gained from Utah Territory. (U.S. Stat., vol. 12, ch. 173 [1862], p. 575; Van Zandt, 158-160)
16 Jan 1864
WASHINGTON lost to creation of KANE. (Utah Terr. Laws 1863, 13th sess., pp. 18-19)
10 Jan 1866
WASHINGTON gained from IRON. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 2/p. 207)
05 May 1866
WASHINGTON lost to the state of Nevada when Nevada gained from Utah Territory; WASHINGTON eliminated from Nevada. (U.S. Stat., vol. 14, ch. 73[1866]/p. 43; Van Zandt, 158-159)
18 Feb 1869
WASHINGTON lost to creation of RIO VIRGEN (Utah Territory, extinct). (Utah Terr. Laws 1869, 18th sess., ch. 10/p. 7; Atlas of Utah, 163-164)
01 Aug 1869
WASHINGTON lost to KANE. Act passed 19 February 1869; took effect 1 August 1869. (Utah Terr. Laws 1869, 18th sess., ch. 18/p. 17)
16 Feb 1872
WASHINGTON gained all of RIO VIRGEN (Utah Territory); RIO VIRGEN eliminated. (Utah Terr. Laws 1872, 20th sess., ch. 19, sec. 2/p. 28)
01 Jan 1883
WASHINGTON gained from KANE, exchanged with IRON. Act passed 9 March 1882; took effect 1 January 1883. (Utah Terr. Laws 1882, 25th sess., ch. 52, pp. 98-101)
10 Mar 1892
WASHINGTON lost to IRON. (Utah Terr. Laws 1892, 30th sess., ch. 45, p. 47)
04 Jan 1896
WASHINGTON became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)
08 May 1917
WASHINGTON boundaries were clarified [no change]. (Utah Laws 1917, 12th sess., ch. 78, pp. 226-227)

WAYNE

10 Mar 1892
WAYNE created by Utah Territory from PIUTE. (Utah Terr. Laws 1892, 30th sess., ch. 71, pp. 79-81)
04 Jan 1896
WAYNE became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)

WEBER

31 Jan 1850
WEBER created by the state of Deseret. (Morgan, 47-48, 144; HRS Utah, Weber, 9)
05 Oct 1850
WEBER lost to creation of DAVIS by the state of Deseret. (Morgan, 54-55, 152-153)
05 Apr 1851
The state of Deseret was dissolved by its General Assembly, upon recommendation of Brigham Young. State of Deseret counties, including WEBER, continued to operate. (Brown, Cannon, and Jackson, 90; Powell, 139)
03 Mar 1852
WEBER boundaries redefined by Utah Territory. WEBER gained from DAVIS and non-county area; WEBER included parts of present Utah and Nevada. DESERT (Utah Territory, extinct) not fully organized, attached to WEBER "for election, revenue, and judicial purposes." (Utah Terr. Laws 1851, 1st sess., secs. 1, 3/p. 162)
10 Jan 1855
WEBER lost to DAVIS. (Utah Terr. Laws 1854, 4th sess., ch. 85/pp. 279-280)
05 Jan 1856
WEBER lost to CARSON (Utah Territory, extinct), and lost to creation of BOX ELDER, CACHE, GREASEWOOD (Utah Territory, extinct), HUMBOLDT (Utah Territory, extinct), MALAD (Utah Territory, extinct), and ST. MARY'S (Utah Territory, extinct); WEBER eliminated from Nevada. (Utah Terr. Laws 1855, 5th sess., pp. 5-7)
17 Jan 1862
WEBER gained from BOX ELDER and SUMMIT; lost to creation of MORGAN, and lost islands in Great Salt Lake that were attached to GREAT SALT LAKE (now SALT LAKE) "for election, revenue and judicial purposes." DESERT (Utah Territory) lost all territory to BOX ELDER and TOOELE; DESERT eliminated, ending its attachment to WEBER. (Utah Terr. Laws 1861, 11th sess., secs. 11-13/p. 49)
10 Jan 1866
WEBER boundaries were redefined [no change]. (Utah Terr. Laws 1865, 15th sess., ch. 146, sec. 15/p. 209)
18 Feb 1880
WEBER gained part of the islands and waters of Great Salt Lake that had previously been attached to SALT LAKE, and lost to BOX ELDER. (Utah Terr. Laws 1880, 24th sess., ch. 14, sec. 3/p. 16)
04 Jan 1896
WEBER became a county in the state of Utah. (U.S. Stat., vol. 28, ch. 138 [1894]/pp. 107-112; U.S. Stat., vol. 29, procl. no. 9, [1896]/pp. 876-877; Van Zandt, 159)