Idaho / Counties by Population

Idaho Counties by Population

Below are the 44 Idaho counties sorted by population from 1 to 44 . The population data are from the 2021 Population Estimates Program and 2020 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!

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Rank County Population
1 Ada County 511,931
2 Canyon County 243,115
3 Kootenai County 179,789
4 Bonneville County 127,930
5 Twin Falls County 92,243
6 Bannock County 88,263
7 Madison County 53,881
8 Bonner County 49,491
9 Bingham County 48,876
10 Nez Perce County 42,454
11 Latah County 40,313
12 Jefferson County 32,202
13 Elmore County 28,827
14 Payette County 26,350
15 Cassia County 25,164
16 Blaine County 24,766
17 Jerome County 24,662
18 Minidoka County 21,955
19 Gem County 19,792
20 Idaho County 17,040
21 Gooding County 15,772
22 Franklin County 14,666
23 Shoshone County 13,612
24 Fremont County 13,592
25 Boundary County 12,561
26 Owyhee County 12,336
27 Teton County 12,267
28 Valley County 12,241
29 Washington County 10,898
30 Benewah County 9,931
31 Clearwater County 8,895
32 Lemhi County 8,162
33 Boise County 8,094
34 Power County 7,950
35 Caribou County 7,111
36 Bear Lake County 6,545
37 Lincoln County 5,282
38 Adams County 4,625
39 Oneida County 4,611
40 Custer County 4,428
41 Lewis County 3,715
42 Butte County 2,654
43 Camas County 1,139
44 Clark County 792

United States Census Bureau. B01001 SEX BY AGE, 2020 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 17 March 2022. http://www.census.gov/.

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2021. U.S. Census Bureau, Population Division. Web. May 2022. http://www.census.gov/.

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