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Idaho Counties by Population

The most populated counties in Idaho are Ada County with 524,673, Canyon County at 257,674, Kootenai County with 185,010, Bonneville County at 131,366, and Twin Falls County with 95,156. You can get the most current Census population data for all 44 Idaho counties, sorted from the most populous counties in Idaho to the least, according to the 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Idaho counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!

Download the newest population data for Idaho counties

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Rank County Population
1 Ada County 524,673
2 Canyon County 257,674
3 Kootenai County 185,010
4 Bonneville County 131,366
5 Twin Falls County 95,156
6 Bannock County 90,400
7 Madison County 54,547
8 Bonner County 52,547
9 Bingham County 50,395
10 Nez Perce County 42,987
11 Latah County 41,301
12 Jefferson County 34,198
13 Elmore County 29,724
14 Payette County 27,279
15 Cassia County 25,696
16 Jerome County 25,479
17 Blaine County 25,041
18 Minidoka County 22,480
19 Gem County 21,071
20 Idaho County 17,890
21 Gooding County 16,061
22 Franklin County 15,494
23 Fremont County 14,196
24 Shoshone County 14,026
25 Boundary County 13,557
26 Owyhee County 12,722
27 Valley County 12,644
28 Teton County 12,549
29 Washington County 11,425
30 Benewah County 10,369
31 Clearwater County 9,214
32 Boise County 8,517
33 Lemhi County 8,441
34 Power County 8,253
35 Caribou County 7,219
36 Bear Lake County 6,766
37 Lincoln County 5,450
38 Oneida County 4,953
39 Adams County 4,903
40 Custer County 4,523
41 Lewis County 3,739
42 Butte County 2,758
43 Camas County 1,232
44 Clark County 801

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2023. U.S. Census Bureau, Population Division. Web. March 2024. http://www.census.gov/.

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