Counties in Idaho
Idaho has 44 counties. Find yours from your location, or explore the map and the full list with seats, population, time zones and FIPS codes.
Updated · Data: U.S. Census Bureau
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Idaho has 44 counties, home to about 1,893,296 people. Sort the table by any column, or search by name or seat.
Idaho county map
County explorer: all 44 counties in Idaho
| County | Seat | Population | Land sq mi | People / sq mi | Median home | Time zone | FIPS |
|---|---|---|---|---|---|---|---|
| Ada | Boise | 508,052 | 1,052.2 | 483 | $476,000 | Mountain | 16001 |
| Canyon | Caldwell | 242,405 | 587.0 | 413 | $350,300 | Mountain | 16027 |
| Kootenai | Coeur d'Alene | 177,736 | 1,237.8 | 144 | $467,400 | Pacific | 16055 |
| Bonneville | Idaho Falls | 127,056 | 1,866.0 | 68 | $327,000 | Mountain | 16019 |
| Twin Falls | Twin Falls | 92,121 | 1,921.7 | 48 | $292,700 | Mountain | 16083 |
| Bannock | Pocatello | 88,457 | 1,112.5 | 80 | $267,200 | Mountain | 16005 |
| Madison | Rexburg | 53,578 | 469.3 | 114 | $365,000 | Mountain | 16065 |
| Bonner | Sandpoint | 49,456 | 1,733.2 | 29 | $433,400 | Pacific | 16017 |
| Bingham | Blackfoot | 48,993 | 2,093.7 | 23 | $258,000 | Mountain | 16011 |
| Nez Perce | Lewiston | 42,477 | 848.3 | 50 | $291,300 | Pacific | 16069 |
| Latah | Moscow | 40,315 | 1,075.9 | 37 | $342,500 | Pacific | 16057 |
| Jefferson | Rigby | 32,234 | 1,093.7 | 29 | $335,000 | Mountain | 16051 |
| Elmore | Mountain Home | 29,046 | 3,075.1 | 9 | $278,300 | Mountain | 16039 |
| Payette | Payette | 26,190 | 406.9 | 64 | $310,700 | Mountain | 16075 |
| Cassia | Burley | 25,165 | 2,565.6 | 10 | $257,300 | Mountain | 16031 |
| Jerome | Jerome | 24,788 | 597.5 | 41 | $254,000 | Mountain | 16053 |
| Blaine | Hailey | 24,579 | 2,637.7 | 9 | $663,800 | Mountain | 16013 |
| Minidoka | Rupert | 21,922 | 757.2 | 29 | $235,300 | Mountain | 16067 |
| Gem | Emmett | 19,854 | 559.8 | 35 | $367,300 | Mountain | 16045 |
| Idaho | Grangeville | 17,120 | 8,477.5 | 2 | $284,600 | Pacific (split) | 16049 |
| Gooding | Gooding | 15,740 | 729.3 | 22 | $231,800 | Mountain | 16047 |
| Franklin | Preston | 14,715 | 663.0 | 22 | $304,000 | Mountain | 16041 |
| Fremont | St. Anthony | 13,701 | 1,864.0 | 7 | $281,800 | Mountain | 16043 |
| Shoshone | Wallace | 13,580 | 2,637.4 | 5 | $222,700 | Pacific | 16079 |
| Boundary | Bonners Ferry | 12,695 | 1,268.7 | 10 | $344,100 | Pacific | 16021 |
| Owyhee | Murphy | 12,284 | 7,668.2 | 2 | $281,600 | Mountain | 16073 |
| Valley | Cascade | 12,136 | 3,665.1 | 3 | $599,500 | Mountain | 16085 |
| Teton | Driggs | 12,101 | 449.1 | 27 | $595,900 | Mountain | 16081 |
| Washington | Weiser | 10,866 | 1,452.9 | 7 | $250,300 | Mountain | 16087 |
| Benewah | St. Maries | 9,913 | 776.9 | 13 | $255,800 | Pacific | 16009 |
| Clearwater | Orofino | 8,921 | 2,457.3 | 4 | $240,800 | Pacific | 16035 |
| Lemhi | Salmon | 8,166 | 4,563.7 | 2 | $282,100 | Mountain | 16059 |
| Boise | Idaho City | 8,045 | 1,899.4 | 4 | $424,100 | Mountain | 16015 |
| Power | American Falls | 8,018 | 1,403.8 | 6 | $191,200 | Mountain | 16077 |
| Caribou | Soda Springs | 7,118 | 1,764.2 | 4 | $220,200 | Mountain | 16029 |
| Bear Lake | Paris | 6,552 | 975.7 | 7 | $234,200 | Mountain | 16007 |
| Lincoln | Shoshone | 5,276 | 1,201.4 | 4 | $206,700 | Mountain | 16063 |
| Oneida | Malad City | 4,681 | 1,199.0 | 4 | $228,100 | Mountain | 16071 |
| Adams | Council | 4,599 | 1,362.8 | 3 | $327,300 | Mountain | 16003 |
| Custer | Challis | 4,411 | 4,922.2 | 1 | $295,600 | Mountain | 16037 |
| Lewis | Nezperce | 3,649 | 478.8 | 8 | $202,400 | Pacific | 16061 |
| Butte | Arco | 2,654 | 2,236.5 | 1 | $195,800 | Mountain | 16023 |
| Camas | Fairfield | 1,155 | 1,074.2 | 1 | $248,900 | Mountain | 16025 |
| Clark | Dubois | 776 | 1,763.1 | 0 | $203,000 | Mountain | 16033 |
Which Idaho cities are in more than one county?
- Burley: Cassia County 98.7%, Minidoka County 1.3% of residents
- Fort Hall: Bannock County 51.5%, Bingham County 48.5% of residents
Sources: Census TIGER/Line 2024; ACS 2019-2023 5-year; Wikidata, CC0 (seats); timezone-boundary-builder (time zones). Data as of November 1, 2026. Not affiliated with any government agency.
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