Idaho Counties Map
Hover/click a county for data.
| Name | 2022 Population | Growth Since 2010 | Land Area (mi²) | Density (mi²) |
|---|---|---|---|---|
| Ada County | 520,056 | 32.21% | 1,052.63 | 494.06 |
| Adams County | 4,474 | 12.92% | 1,363.06 | 3.28 |
| Bannock County | 91,210 | 9.87% | 1,111.99 | 82.02 |
| Bear Lake County | 6,368 | 6.68% | 974.88 | 6.53 |
| Benewah County | 9,538 | 2.67% | 776.62 | 12.28 |
| Bingham County | 48,857 | 6.76% | 2,093.88 | 23.33 |
| Blaine County | 23,771 | 11.63% | 2,639.92 | 9.00 |
| Boise County | 8,359 | 19.33% | 1,899.24 | 4.40 |
| Bonner County | 48,841 | 19.41% | 1,735.18 | 28.15 |
| Bonneville County | 126,916 | 21.25% | 1,866.07 | 68.01 |
| Boundary County | 12,932 | 17.57% | 1,268.65 | 10.19 |
| Butte County | 2,627 | -9.88% | 2,236.20 | 1.17 |
| Camas County | 1,061 | -4.93% | 1,074.49 | 0.99 |
| Canyon County | 249,688 | 31.87% | 587.37 | 425.10 |
| Caribou County | 7,509 | 7.67% | 1,764.02 | 4.26 |
| Cassia County | 24,747 | 7.22% | 2,564.64 | 9.65 |
| Clark County | 827 | -15.61% | 1,763.43 | 0.47 |
| Clearwater County | 8,750 | 0.26% | 2,457.20 | 3.56 |
| Custer County | 4,510 | 3.51% | 4,920.13 | 0.92 |
| Elmore County | 27,958 | 3.09% | 3,074.74 | 9.09 |
| Franklin County | 14,392 | 12.60% | 663.60 | 21.69 |
| Fremont County | 12,931 | -2.22% | 1,863.76 | 6.94 |
| Gem County | 19,687 | 17.98% | 560.90 | 35.10 |
| Gooding County | 15,368 | -0.67% | 728.97 | 21.08 |
| Idaho County | 17,240 | 5.70% | 8,477.26 | 2.03 |
| Jefferson County | 31,269 | 19.24% | 1,093.51 | 28.60 |
| Jerome County | 25,450 | 13.40% | 597.19 | 42.62 |
| Kootenai County | 179,161 | 29.03% | 1,244.13 | 144.01 |
| Latah County | 40,945 | 9.90% | 1,076.00 | 38.05 |
| Lemhi County | 8,312 | 4.51% | 4,563.29 | 1.82 |
| Lewis County | 3,856 | 0.94% | 478.80 | 8.05 |
| Lincoln County | 5,270 | 1.23% | 1,201.39 | 4.39 |
| Madison County | 41,845 | 11.31% | 469.22 | 89.18 |
| Minidoka County | 21,999 | 9.54% | 757.59 | 29.04 |
| Nez Perce County | 40,864 | 3.94% | 848.09 | 48.18 |
| Oneida County | 4,738 | 10.44% | 1,199.79 | 3.95 |
| Owyhee County | 12,285 | 7.08% | 7,665.54 | 1.60 |
| Payette County | 25,283 | 11.69% | 406.87 | 62.14 |
| Power County | 7,624 | -3.15% | 1,404.27 | 5.43 |
| Shoshone County | 13,158 | 3.21% | 2,629.77 | 5.00 |
| Teton County | 13,615 | 34.12% | 449.46 | 30.29 |
| Twin Falls County | 89,425 | 15.32% | 1,921.22 | 46.55 |
| Valley County | 12,505 | 27.76% | 3,664.52 | 3.41 |
| Washington County | 10,431 | 2.50% | 1,452.94 | 7.18 |
- Idaho Department of Labor
- US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
- American Community Survey (2009 - 2013)
- Census QuickFacts
- Historical Populations of States and Counties (1790 - 1990)