Idaho Demographics
Idaho is the 39th most populous of 52 states in the United States, with 1,839,096 residents across 82,645 square miles. That is about 22 people per square mile. 69% of residents live in urban areas.
At the 2020 census
| Population | 1,839,096 |
|---|---|
| Land area | 82,645 sq mi |
| Density | 22 / sq mi |
| Urban share | 69% |
Data: 2020 Census · American Community Survey 2024
How Idaho compares to the US
We're computing this state's comparison table — check back shortly. Population, land area, and density above are already exact.
Central Location: Idaho
Measured from the state's main population center using 2020 census blocks.
We're computing the drive-time and radius areas around Idaho — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.
Counties in Idaho
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Ada County | 494,967 | 1,052.0 | 470 |
| Canyon County | 231,105 | 587.0 | 394 |
| Kootenai County | 171,362 | 1,237.8 | 138 |
| Bonneville County | 123,964 | 1,866.0 | 66 |
| Twin Falls County | 90,046 | 1,921.7 | 47 |
| Bannock County | 87,018 | 1,112.5 | 78 |
| Madison County | 52,913 | 469.3 | 113 |
| Bingham County | 47,992 | 2,093.7 | 23 |
| Bonner County | 47,110 | 1,733.2 | 27 |
| Nez Perce County | 42,090 | 848.3 | 50 |
| Latah County | 39,517 | 1,075.9 | 37 |
| Jefferson County | 30,891 | 1,093.7 | 28 |
| Elmore County | 28,666 | 3,075.1 | 9 |
| Payette County | 25,386 | 406.9 | 62 |
| Cassia County | 24,655 | 2,565.6 | 10 |
| Blaine County | 24,272 | 2,637.7 | 9 |
| Jerome County | 24,237 | 597.5 | 41 |
| Minidoka County | 21,613 | 757.0 | 29 |
| Gem County | 19,123 | 559.8 | 34 |
| Idaho County | 16,541 | 8,477.5 | 2 |
| Gooding County | 15,598 | 729.3 | 21 |
| Franklin County | 14,194 | 663.0 | 21 |
| Fremont County | 13,388 | 1,864.0 | 7 |
| Shoshone County | 13,169 | 2,637.4 | 5 |
| Boundary County | 12,056 | 1,268.7 | 10 |
| Owyhee County | 11,913 | 7,668.2 | 2 |
| Valley County | 11,746 | 3,665.1 | 3 |
| Teton County | 11,630 | 449.1 | 26 |
| Washington County | 10,500 | 1,452.9 | 7 |
| Benewah County | 9,530 | 776.9 | 12 |
| Clearwater County | 8,734 | 2,457.3 | 4 |
| Lemhi County | 7,974 | 4,563.7 | 2 |
| Power County | 7,878 | 1,403.8 | 6 |
| Boise County | 7,610 | 1,899.6 | 4 |
| Caribou County | 7,027 | 1,764.2 | 4 |
| Bear Lake County | 6,372 | 975.7 | 7 |
| Lincoln County | 5,127 | 1,201.4 | 4 |
| Oneida County | 4,564 | 1,199.0 | 4 |
| Adams County | 4,379 | 1,362.8 | 3 |
| Custer County | 4,275 | 4,922.2 | 1 |
| Lewis County | 3,533 | 478.8 | 7 |
| Butte County | 2,574 | 2,236.5 | 1 |
| Camas County | 1,077 | 1,074.2 | 1 |
| Clark County | 790 | 1,763.1 | 0 |
Largest cities in Idaho
| Name | Population | Sq mi | Per sq mi |
|---|---|---|---|
| Boise City, ID | 235,638 | 84.3 | 2,795 |
| Meridian, ID | 117,871 | 36.4 | 3,239 |
| Nampa, ID | 101,186 | 34.8 | 2,910 |
| Idaho Falls, ID | 65,246 | 26.1 | 2,499 |
| Caldwell, ID | 60,292 | 23.5 | 2,564 |
| Pocatello, ID | 56,321 | 33.4 | 1,688 |
| Coeur d'Alene, ID | 54,687 | 16.1 | 3,396 |
| Twin Falls, ID | 51,860 | 19.6 | 2,647 |
| Rexburg, ID | 39,422 | 10.1 | 3,899 |
| Post Falls, ID | 38,500 | 16.2 | 2,381 |
| Lewiston, ID | 34,203 | 17.3 | 1,974 |
| Eagle, ID | 30,421 | 31.5 | 967 |
Showing the 12 most populous of 237 — the rest are shown on the map.
Related places
About this page
This page shows demographics for a US state from the 2020 census and the American Community Survey: population, land area, density, and how the state compares to national averages for income, housing, age, and more.
Use the links below to drill into the state's counties and largest cities, or open any point of the state in the radius tool to measure the population within a distance or drive time.