Idaho Population By County in 2017

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2017, the population of Idaho was 1,719,745. Among all Idaho counties, Ada had the highest population (456,994), followed by Canyon (217,037), and Kootenai (157,594). Clark was the least populated county (878).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Idaho Population By County in 2017
Idaho Population By County in 2017
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County Population % of State Population
Ada 456994 26.57
Adams 4128 0.24
Bannock 85571 4.98
Bear Lake 6029 0.35
Benewah 9167 0.53
Bingham 45888 2.67
Blaine 22401 1.30
Boise 7370 0.43
Bonner 43715 2.54
Bonneville 114608 6.66
Boundary 11995 0.70
Butte 2582 0.15
Camas 1092 0.06
Canyon 217037 12.62
Caribou 6980 0.41
Cassia 23661 1.38
Clark 878 0.05
Clearwater 8651 0.50
Custer 4138 0.24
Elmore 26907 1.57
Franklin 13501 0.79
Fremont 13140 0.76
Gem 17351 1.01
Gooding 15155 0.88
Idaho 16392 0.95
Jefferson 28448 1.65
Jerome 23791 1.38
Kootenai 157594 9.16
Latah 39903 2.32
Lemhi 7837 0.46
Lewis 3883 0.23
Lincoln 5361 0.31
Madison 39540 2.30
Minidoka 20683 1.20
Nez Perce 40376 2.35
Oneida 4393 0.26
Owyhee 11632 0.68
Payette 23218 1.35
Power 7587 0.44
Shoshone 12511 0.73
Teton 11463 0.67
Twin Falls 85439 4.97
Valley 10700 0.62
Washington 10055 0.59