Idaho / Counties by Population

Idaho Counties by Population

Below are the 44 Idaho counties sorted by population from largest to smallest. The population data are from the 2021 American Community Survey. You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

Rank County Population
1 Ada County 485,246
2 Canyon County 227,367
3 Kootenai County 168,317
4 Bonneville County 121,771
5 Twin Falls County 89,128
6 Bannock County 86,362
7 Madison County 50,979
8 Bingham County 47,540
9 Bonner County 46,481
10 Nez Perce County 41,820
11 Latah County 39,464
12 Jefferson County 30,427
13 Elmore County 28,396
14 Payette County 24,928
15 Cassia County 24,469
16 Jerome County 24,081
17 Blaine County 23,868
18 Minidoka County 21,393
19 Gem County 18,692
20 Idaho County 16,494
21 Gooding County 15,422
22 Franklin County 14,036
23 Fremont County 13,370
24 Shoshone County 13,124
25 Boundary County 11,966
26 Owyhee County 11,815
27 Teton County 11,490
28 Valley County 11,476
29 Washington County 10,425
30 Benewah County 9,509
31 Clearwater County 8,719
32 Lemhi County 7,948
33 Power County 7,854
34 Boise County 7,549
35 Caribou County 7,003
36 Bear Lake County 6,327
37 Lincoln County 5,184
38 Oneida County 4,514
39 Adams County 4,321
40 Custer County 4,273
41 Lewis County 3,613
42 Butte County 2,573
43 Camas County 1,044
44 Clark County 839

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022. http://www.census.gov/.

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