List of Counties in Idaho - Alphabetical List

Alphabetical List

County
FIPS code
County seat
Established
Origin
Etymology
Population
Area
Map
Ada County 001 Boise 1864 Boise County Ada Riggs, daughter of H. C. Riggs, a member of the Idaho Territorial Legislature. 7005392365000000000392,365 70031055000000000001,055 sq mi
(70032732000000000002,732 km2)
Adams County 003 Council 1911 Washington County John Adams, second President of the United States . 70033976000000000003,976 70031365000000000001,365 sq mi
(70033535000000000003,535 km2)
Bannock County 005 Pocatello 1893 Bingham County Bannock Native American tribe. 700482839000000000082,839 70031113000000000001,113 sq mi
(70032883000000000002,883 km2)
Bear Lake County 007 Paris 1893 Oneida County Bear Lake on the Utah/Idaho border. 70035986000000000005,986 7002971000000000000971 sq mi
(70032515000000000002,515 km2)
Benewah County 009 St. Maries 1915 Kootenai County Benewah, chief of the Coeur d'Alene Tribe 70039285000000000009,285 7002776000000000000776 sq mi
(70032010000000000002,010 km2)
Bingham County 011 Blackfoot 1885 Oneida County Henry H. Bingham, a general in the American Civil War and a U.S. Congressman from Pennsylvania. 700445607000000000045,607 70032095000000000002,095 sq mi
(70035426000000000005,426 km2)
Blaine County 013 Hailey 1895 Alturas County James G. Blaine, United States Secretary of State . 700421376000000000021,376 70032645000000000002,645 sq mi
(70036851000000000006,851 km2)
Boise County 015 Idaho City 1864 Original county Boise River 70037028000000000007,028 70031902000000000001,902 sq mi
(70034926000000000004,926 km2)
Bonner County 017 Sandpoint 1907 Kootenai County Edwin L. Bonner, originator of a 1864 ferry service on the Kootenai River. 700440877000000000040,877 70031738000000000001,738 sq mi
(70034501000000000004,501 km2)
Bonneville County 019 Idaho Falls 1911 Bingham County Benjamin Bonneville, a French-born explorer of the West. 7005104234000000000104,234 70031869000000000001,869 sq mi
(70034841000000000004,841 km2)
Boundary County 021 Bonners Ferry 1915 Bonner Borders Canada on the north. 700410972000000000010,972 70031269000000000001,269 sq mi
(70033287000000000003,287 km2)
Butte County 023 Arco 1917 Bingham, Blaine, and Jefferson counties Buttes rising from the Snake River Plain. 70032891000000000002,891 70032233000000000002,233 sq mi
(70035783000000000005,783 km2)
Camas County 025 Fairfield 1917 Blaine County Camassia, a plant species important as a food source among Native Americans and early settlers. 70031117000000000001,117 70031075000000000001,075 sq mi
(70032784000000000002,784 km2)
Canyon County 027 Caldwell 1892 Ada County Disputed, either a canyon of the Boise River near Caldwell or a canyon of the Snake River which forms part of the county's boundary. 7005188923000000000188,923 7002590000000000000590 sq mi
(70031528000000000001,528 km2)
Caribou County 029 Soda Springs 1919 Bannock County Caribou Mountains 70036963000000000006,963 70031766000000000001,766 sq mi
(70034574000000000004,574 km2)
Cassia County 031 Burley 1879 Owyhee County Disputed, either Cassia Creek or a member of the Mormon Battalion, James John Cazier. 700422952000000000022,952 70032567000000000002,567 sq mi
(70036648000000000006,648 km2)
Clark County 033 Dubois 1919 Fremont County Sam K. Clark, early settler and a member of the Idaho Senate. 7002982000000000000982 70031765000000000001,765 sq mi
(70034571000000000004,571 km2)
Clearwater County 035 Orofino 1911 Nez Perce County Clearwater River 70038761000000000008,761 70032462000000000002,462 sq mi
(70036377000000000006,377 km2)
Custer County 037 Challis 1881 Alturas and Lemhi counties General Custer mine, named after George Armstrong Custer, United States Army general. 70034368000000000004,368 70034926000000000004,926 sq mi
(700412758000000000012,758 km2)
Elmore County 039 Mountain Home 1889 Alturas County Ida Elmore mines, locally noted for gold and silver production in the 1860s. 700427038000000000027,038 70033078000000000003,078 sq mi
(70037972000000000007,972 km2)
Franklin County 041 Preston 1913 Oneida County Franklin D. Richards, early LDS Church apostle. 700412786000000000012,786 7002666000000000000666 sq mi
(70031725000000000001,725 km2)
Fremont County 043 Saint Anthony 1893 Bingham County John C. Frémont, an explorer of the West. 700413242000000000013,242 70031867000000000001,867 sq mi
(70034836000000000004,836 km2)
Gem County 045 Emmett 1915 Boise and Canyon counties State nickname of "Gem State." 700416719000000000016,719 7002563000000000000563 sq mi
(70031458000000000001,458 km2)
Gooding County 047 Gooding 1913 Lincoln County Frank R. Gooding, seventh Governor of Idaho, U.S. Senator . 700415464000000000015,464 7002731000000000000731 sq mi
(70031893000000000001,893 km2)
Idaho County 049 Grangeville 1864 Original county Columbia River steamship Idaho launched in 1860. Name predates both Idaho Territory and the State of Idaho. 700416267000000000016,267 70038485000000000008,485 sq mi
(700421976000000000021,976 km2)
Jefferson County 051 Rigby 1913 Fremont County Thomas Jefferson, third President of the United States . 700426140000000000026,140 70031095000000000001,095 sq mi
(70032836000000000002,836 km2)
Jerome County 053 Jerome 1919 Gooding and Lincoln counties Disputed, either North Side Irrigation Project developer Jerome Hill, his son-in-law Jerome Kuhn, or his grandson Jerome Kuhn, Jr. 700422374000000000022,374 7002600000000000000600 sq mi
(70031554000000000001,554 km2)
Kootenai County 055 Coeur d'Alene 1864 Nez Perce County Kootenai Native American tribe. 7005138494000000000138,494 70031245000000000001,245 sq mi
(70033225000000000003,225 km2)
Latah County 057 Moscow 1888 Nez Perce County Latah Creek, Nez Perce for "the place of pine trees and sestle." 700437244000000000037,244 70031077000000000001,077 sq mi
(70032789000000000002,789 km2)
Lemhi County 059 Salmon 1869 Idaho County Limhi, king of the Nephites according to the Book of Mormon. 70037936000000000007,936 70034564000000000004,564 sq mi
(700411821000000000011,821 km2)
Lewis County 061 Nezperce 1911 Nez Perce County Meriwether Lewis, a leader of the Lewis and Clark Expedition. 70033821000000000003,821 7002479000000000000479 sq mi
(70031241000000000001,241 km2)
Lincoln County 063 Shoshone 1895 Logan County Abraham Lincoln, sixteenth President of the United States . Idaho Territory was founded under Lincoln's administration. 70035208000000000005,208 70031206000000000001,206 sq mi
(70033124000000000003,124 km2)
Madison County 065 Rexburg 1913 Fremont County James Madison, fourth President of the United States . 700437536000000000037,536 7002472000000000000472 sq mi
(70031222000000000001,222 km2)
Minidoka County 067 Rupert 1913 Lincoln County Disputed Native American origin, either Lakota for "a fountain or spring of water" or Shoshoni for "broad expanse." 700420069000000000020,069 7002760000000000000760 sq mi
(70031968000000000001,968 km2)
Nez Perce County 069 Lewiston 1864 Original county The Nez Perce, a Native American tribe. 700439265000000000039,265 7002849000000000000849 sq mi
(70032199000000000002,199 km2)
Oneida County 071 Malad City 1864 Original County Oneida Lake in New York state, where many early settlers were from. 70034286000000000004,286 70031200000000000001,200 sq mi
(70033108000000000003,108 km2)
Owyhee County 073 Murphy 1863 Original county Corruption of Hawaii. Hawaiian fur trappers explored the area in 1819 and 1820. 700411526000000000011,526 70037678000000000007,678 sq mi
(700419886000000000019,886 km2)
Payette County 075 Payette 1917 Canyon County Francois Payette, Canadian-born fur trader and early settler. 700422623000000000022,623 7002408000000000000408 sq mi
(70031057000000000001,057 km2)
Power County 077 American Falls 1913 Bingham, Blaine, and Oneida counties The American Falls Power Plant 70037817000000000007,817 70031406000000000001,406 sq mi
(70033642000000000003,642 km2)
Shoshone County 079 Wallace 1864 Original county Shoshone Native American tribe. 700412765000000000012,765 70032634000000000002,634 sq mi
(70036822000000000006,822 km2)
Teton County 081 Driggs 1915 Bingham, Fremont, and Madison counties Teton Range and valley. 700410170000000000010,170 7002450000000000000450 sq mi
(70031165000000000001,165 km2)
Twin Falls County 083 Twin Falls 1907 Cassia County Twin Falls waterfall on the Snake River. 700477230000000000077,230 70031925000000000001,925 sq mi
(70034986000000000004,986 km2)
Valley County 085 Cascade 1917 Boise and Idaho counties Long Valley located in the county. 70037651000000000007,651 70033733000000000003,733 sq mi
(70039668000000000009,668 km2)
Washington County 087 Weiser 1879 Ada County George Washington, first President of the United States . 700410198000000000010,198 70031456000000000001,456 sq mi
(70033771000000000003,771 km2)

Read more about this topic:  List Of Counties In Idaho

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