Idaho: Index of Counties and Equivalents

Idaho Atlas of Historical County Boundaries

John H. Long, Editor; Peggy Tuck Sinko, Associate Editor; Emily Kelley, Historical Compiler; Laura Rico-Beck, GIS Specialist and Digital Compiler; Peter Siczewicz, ArcIMS Interactive Map Designer; Robert Will, Cartographic Assistant

Copyright The Newberry Library 2007


ADA

ADAMS

ALTA (extinct)

ALTURAS (extinct)

Annexation 1 (proposed)

Annexation 2 (proposed)

Annexation 3 (proposed)

Annexation 4 (proposed)

Annexation 5 (proposed)

Annexation 6 (proposed)

BANNOCK

BEAR LAKE

BEAVERHEAD (Mont.)

BENEWAH

BIG HORN (Mont., orig.) (now CUSTER, Mont.)

BINGHAM

BLAINE

BOISE

BONNER

BONNEVILLE

BOUNDARY

BUTTE

CAMAS

CANYON

CARIBOU

CASSIA

CHAMPOEG (Ore.) (now MARION, Ore.)

CHOTEAU (Mont.) (now CHOUTEAU, Mont.)

CLACKAMAS (Ore.)

CLARK (proposed)

CLARK

CLEARWATER (proposed)

CLEARWATER

CUSTER

DAWSON (Mont.)

DEER LODGE (Mont.)

ELMORE

FRANKLIN

FREMONT

GEM

GOODING

IDAHO

JEFFERSON (Mont.)

JEFFERSON

JEROME

KOOTENAI

LAH-TOH (Idaho Terr., extinct)

LANE (Ore.)

LATAH

LEMHI

LEWIS (proposed)

LEWIS

LINCOLN (original, extinct)

LINCOLN

LINN (Ore.)

LOGAN (extinct)

MADISON (Mont.)

MADISON

MARION (Ore.) (created as CHAMPOEG, Ore.)

MINIDOKA

MISSOULA (Mont.)

NEZ PERCE

Non-County Area 1

Non-County Area 2

OGALALA (Idaho Terr., extinct)

ONEIDA

Oregon Territory (non-county area)

Overlap Area 1

Overlap Area 2

OWYHEE

PAYETTE

POWER

SELWAY (proposed)

SHOSHONE

SKAMANIA (Wash.)

SPOKANE (Wash. Terr.; orig., extinct)

TETON

TWIN FALLS

VALLEY

WALLA WALLA (Wash.)

WASCO (Ore.)

WASHINGTON

Washington Territory (non-county area)

YELLOWSTONE (Idaho Terr., extinct)