Idaho Counties by Population

Below are the 44 Idaho counties sorted by population from largest to smallest. The population data are from the 2022 Population Estimates Program and 2021 American Community Survey.

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Rank County Population
1 Ada County 518,907
2 Canyon County 251,065
3 Kootenai County 183,578
4 Bonneville County 129,496
5 Twin Falls County 93,696
6 Bannock County 89,517
7 Madison County 54,976
8 Bonner County 51,414
9 Bingham County 49,923
10 Nez Perce County 43,004
11 Latah County 40,978
12 Jefferson County 33,428
13 Elmore County 29,403
14 Payette County 26,956
15 Cassia County 25,655
16 Jerome County 25,311
17 Blaine County 24,866
18 Minidoka County 22,194
19 Gem County 20,418
20 Idaho County 17,593
21 Gooding County 15,715
22 Franklin County 15,189
23 Shoshone County 14,012
24 Fremont County 13,978
25 Boundary County 13,345
26 Owyhee County 12,613
27 Teton County 12,544
28 Valley County 12,464
29 Washington County 11,087
30 Benewah County 10,370
31 Clearwater County 9,015
32 Boise County 8,333
33 Lemhi County 8,240
34 Power County 8,068
35 Caribou County 7,190
36 Bear Lake County 6,722
37 Lincoln County 5,329
38 Adams County 4,817
39 Oneida County 4,712
40 Custer County 4,506
41 Lewis County 3,763
42 Butte County 2,684
43 Camas County 1,153
44 Clark County 806

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/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2022. U.S. Census Bureau, Population Division. Web. May 2023. http://www.census.gov/.

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