Idaho Counties by Population

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

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Rank County Population
1 Ada County 497,494
2 Canyon County 235,006
3 Kootenai County 173,396
4 Bonneville County 124,490
5 Twin Falls County 90,592
6 Bannock County 87,434
7 Madison County 52,487
8 Bingham County 48,253
9 Bonner County 47,976
10 Nez Perce County 42,200
11 Latah County 39,872
12 Jefferson County 31,383
13 Elmore County 28,752
14 Payette County 25,571
15 Cassia County 24,859
16 Jerome County 24,474
17 Blaine County 24,248
18 Minidoka County 21,626
19 Gem County 19,250
20 Idaho County 16,787
21 Gooding County 15,520
22 Franklin County 14,376
23 Fremont County 13,519
24 Shoshone County 13,399
25 Boundary County 12,335
26 Owyhee County 12,043
27 Valley County 11,830
28 Teton County 11,813
29 Washington County 10,612
30 Benewah County 9,731
31 Clearwater County 8,810
32 Lemhi County 8,043
33 Power County 7,918
34 Boise County 7,809
35 Caribou County 7,058
36 Bear Lake County 6,436
37 Lincoln County 5,203
38 Oneida County 4,572
39 Adams County 4,464
40 Custer County 4,344
41 Lewis County 3,630
42 Butte County 2,605
43 Camas County 1,133
44 Clark County 756

United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023. http://www.census.gov/.

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