Member
Population
Miles
Size
IdahoIdaho has 44 Counties.
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Idaho Data Sets Idaho Links |
Idaho Association of Counties P.O. Box 1623 Boise, ID 83701-1623 Phone: (208)345-9126 Fax: (208)345-0379 http://www.idcounties.org/
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| County | NACo Member |
2010 Population |
Square Miles |
County Seat | Board Size |
Founded |
|---|---|---|---|---|---|---|
| Ada | |
392,365 | 1,053 | Boise | 3 | 1864 |
| Adams | |
3,976 | 1,363 | Council | 3 | 1911 |
| Bannock | |
82,839 | 1,112 | Pocatello | 3 | 1893 |
| Bear Lake | |
5,986 | 975 | Paris | 3 | 1893 |
| Benewah | |
9,285 | 777 | Saint Maries | 3 | 1915 |
| Bingham | |
45,607 | 2,094 | Blackfoot | 3 | 1885 |
| Blaine | |
21,376 | 2,644 | Hailey | 3 | 1895 |
| Boise | |
7,028 | 1,899 | Idaho City | 3 | 1907 |
| Bonner | |
40,877 | 1,735 | Sandpoint | 3 | 1907 |
| Bonneville | |
104,234 | 1,866 | Idaho Falls | 3 | 1911 |
| Boundary | |
10,972 | 1,269 | Bonners Ferry | 3 | 1915 |
| Butte | |
2,891 | 2,232 | Arco | 3 | 1917 |
| Camas | |
1,117 | 1,074 | Fairfield | 3 | 1917 |
| Canyon | |
188,923 | 587 | Caldwell | 3 | 1892 |
| Caribou | |
6,963 | 1,764 | Soda Springs | 3 | 1919 |
| Cassia | |
22,952 | 2,565 | Burley | 3 | 1879 |
| Clark | |
982 | 1,764 | Dubois | 3 | 1919 |
| Clearwater | |
8,761 | 2,457 | Orofino | 3 | 1911 |
| Custer | |
4,368 | 4,921 | Challis | 3 | 1881 |
| Elmore | |
27,038 | 3,075 | Mountain Home | 3 | 1889 |
| Franklin | |
12,786 | 664 | Preston | 3 | 1913 |
| Fremont | |
13,242 | 1,864 | Saint Anthony | 3 | 1893 |
| Gem | |
16,719 | 561 | Emmett | 3 | 1915 |
| Gooding | |
15,464 | 729 | Gooding | 3 | 1913 |
| Idaho | |
16,267 | 8,477 | Grangeville | 3 | 1864 |
| Jefferson | |
26,140 | 1,094 | Rigby | 3 | 1913 |
| Jerome | |
22,374 | 597 | Jerome | 3 | 1919 |
| Kootenai | |
138,494 | 1,244 | Coeur d Alene | 3 | 1864 |
| Latah | |
37,244 | 1,076 | Moscow | 3 | 1888 |
| Lemhi | |
7,936 | 4,563 | Salmon | 3 | 1869 |
| Lewis | |
3,821 | 479 | Nezperce | 3 | 1911 |
| Lincoln | |
5,208 | 1,201 | Shoshone | 3 | 1895 |
| Madison | |
37,536 | 469 | Rexburg | 3 | 1913 |
| Minidoka | |
20,069 | 758 | Rupert | 3 | 1913 |
| Nez Perce | |
39,265 | 848 | Lewiston | 3 | 1864 |
| Oneida | |
4,286 | 1,200 | Malad City | 3 | 1864 |
| Owyhee | |
11,526 | 7,666 | Murphy | 3 | 1863 |
| Payette | |
22,623 | 407 | Payette | 3 | 1917 |
| Power | |
7,817 | 1,404 | American Falls | 3 | 1913 |
| Shoshone | |
12,765 | 2,630 | Wallace | 3 | 1864 |
| Teton | |
10,170 | 449 | Driggs | 3 | 1915 |
| Twin Falls | |
77,230 | 1,921 | Twin Falls | 3 | 1907 |
| Valley | |
9,862 | 3,665 | Cascade | 3 | 1917 |
| Washington | |
10,198 | 1,453 | Weiser | 3 | 1879 |