Places
The state, its 44 counties and its cities with 15,000 or more residents. Each links to a page with every indicator the site holds for it. The county table carries the seat, the year established and the population; the city table the population. Compare places puts every county and city indicator side by side instead of one place at a time.
Idaho
Every statewide indicator, beside the United States figure for the same period.
Cities
| City | Population |
|---|---|
| Boise | 238,429 (2025) |
| Meridian | 142,988 (2025) |
| Nampa | 120,384 (2025) |
| Caldwell | 76,629 (2025) |
| Idaho Falls | 71,785 (2025) |
| Pocatello | 58,771 (2025) |
| Coeur d'Alene | 58,179 (2025) |
| Twin Falls | 56,216 (2025) |
| Post Falls | 46,715 (2025) |
| Rexburg | 40,334 (2025) |
| Lewiston | 34,717 (2025) |
| Eagle | 34,658 (2025) |
| Kuna | 31,525 (2025) |
| Moscow | 26,721 (2025) |
| Star | 20,874 (2025) |
| Ammon | 20,119 (2025) |
| Hayden | 17,363 (2025) |
| Chubbuck | 16,823 (2025) |
| Mountain Home | 16,779 (2025) |
Source: U.S. Census Bureau, Population Estimates Program. Data period 2025. Published .
Counties
Each county’s license plate code is on its page; the full list is at license plate county codes.
| County | County seat | Established | Population |
|---|---|---|---|
| Ada County | Boise | 1864 | 546,141 (2025) |
| Adams County | Council | 1911 | 5,013 (2025) |
| Bannock County | Pocatello | 1893 | 91,591 (2025) |
| Bear Lake County | Paris | 1875 | 6,727 (2025) |
| Benewah County | St Maries | 1915 | 10,508 (2025) |
| Bingham County | Blackfoot | 1885 | 51,153 (2025) |
| Blaine County | Hailey | 1895 | 25,517 (2025) |
| Boise County | Idaho City | 1864 | 8,545 (2025) |
| Bonner County | Sandpoint | 1907 | 54,420 (2025) |
| Bonneville County | Idaho Falls | 1911 | 135,771 (2025) |
| Boundary County | Bonners Ferry | 1915 | 13,997 (2025) |
| Butte County | Arco | 1917 | 2,783 (2025) |
| Camas County | Fairfield | 1917 | 1,316 (2025) |
| Canyon County | Caldwell | 1891 | 275,123 (2025) |
| Caribou County | Soda Springs | 1919 | 7,252 (2025) |
| Cassia County | Burley | 1879 | 26,397 (2025) |
| Clark County | Dubois | 1919 | 783 (2025) |
| Clearwater County | Orofino | 1911 | 9,118 (2025) |
| Custer County | Challis | 1881 | 4,636 (2025) |
| Elmore County | Mountain Home | 1889 | 29,465 (2025) |
| Franklin County | Preston | 1913 | 15,889 (2025) |
| Fremont County | St Anthony | 1893 | 14,208 (2025) |
| Gem County | Emmett | 1915 | 21,773 (2025) |
| Gooding County | Gooding | 1913 | 16,446 (2025) |
| Idaho County | Grangeville | 1864 | 17,874 (2025) |
| Jefferson County | Rigby | 1913 | 35,297 (2025) |
| Jerome County | Jerome | 1919 | 26,362 (2025) |
| Kootenai County | Coeur d’Alene | 1864 | 191,864 (2025) |
| Latah County | Moscow | 1888 | 41,842 (2025) |
| Lemhi County | Salmon | 1869 | 8,474 (2025) |
| Lewis County | Nez Perce | 1911 | 3,704 (2025) |
| Lincoln County | Shoshone | 1895 | 5,603 (2025) |
| Madison County | Rexburg | 1913 | 55,172 (2025) |
| Minidoka County | Rupert | 1913 | 22,911 (2025) |
| Nez Perce County | Lewiston | 1864 | 42,905 (2025) |
| Oneida County | Malad | 1864 | 5,085 (2025) |
| Owyhee County | Murphy | 1863 | 12,661 (2025) |
| Payette County | Payette | 1917 | 27,824 (2025) |
| Power County | American Falls | 1913 | 8,246 (2025) |
| Shoshone County | Wallace | 1864 | 14,130 (2025) |
| Teton County | Driggs | 1915 | 13,254 (2025) |
| Twin Falls County | Twin Falls | 1907 | 97,539 (2025) |
| Valley County | Cascade | 1917 | 12,831 (2025) |
| Washington County | Weiser | 1879 | 11,583 (2025) |
Source: Idaho Secretary of State, Blue Book of Idaho, 2025-2026.
Source: U.S. Census Bureau, Population Estimates Program. Data period 2025. Published .
This page was last updated .