Colorado Atlas of Historical County Boundaries
John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Robert Will, 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
Copyright The Newberry Library 2009
ARAPAHOE (Kans. Terr., extinct)
ARRAPPAHOE (Jefferson Terr., extinct)
BEAVER (Utah)
BEXAR (Texas)
BRODERICK (Kans. Terr., extinct)
CAPE GIRARDEAU (Mo.)
CARBONATE (extinct)
CHEYENNE (Jefferson Terr., extinct)
Deseret (State of Deseret)
EL PASO (Kans. Terr., extinct)
EL PASO (Jefferson Terr., extinct)
FOUNTAIN (Jefferson Terr., extinct)
FREMONT (Kans. Terr., extinct)
GREAT SALT LAKE (Utah)
GREEN RIVER (Utah Terr., extinct)
GREENWOOD (extinct)
GUADALOUPE (see CONEJOS)
HEELE (Jefferson Terr., extinct)
IRON (Utah)
JACKSON (Jefferson Terr., extinct)
JEFFERSON (Jefferson Terr., extinct)
MONTANA (Kans. Terr., extinct)
MORA (N.M.)
MOUNTAIN (Jefferson Terr., extinct)
NEW MADRID (Mo.)
NORTH (Jefferson Terr., extinct)
ORO (Kans. Terr., extinct)
PARK (Jefferson Terr., extinct)
PEKETON (Kans., extinct)
PLATTE (proposed)
ST. LOUIS (Mo.)
ST. VRAIN (Jefferson Terr., extinct)
STE. GENEVIEVE (Mo.)
SALT LAKE, Utah (see GREAT SALT LAKE, Utah)
SANPETE (Utah)
SANTA FE (Texas, extinct)
SARATOGA (Jefferson Terr., extinct)
SOUTH ARAPAHOE (see ARAPAHOE)
TAOS (N.M.)
UNCOMPAHGRE (extinct)
Unorganized Federal Territory 2
UTAH (Utah)
WASHINGTON (Utah)
WASHINGTON (Kans.)