Idaho Citizen Voting-age Population By County in 2016 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2016, the citizen voting-age population for Idaho was 1,148,895 and represented 70.25% of the total Idaho population.

Among all Idaho counties, Ada had the highest citizen voting-age population (307.09K), followed by Canyon (132.15K), and Kootenai (111.72K).

In terms of percentages, Clearwater had the highest percentage of its population being citizens of voting-age (84.00%), followed by Lemhi (81.54%), and Valley (81.41%).

The chart and table below shows the citizen voting-age population of each county and the percentage of each county's population that were citizens of voting-age.

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

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Idaho Citizen Voting-age Population By County in 2016
Idaho Citizen Voting-age Population By County in 2016
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County Citizen Voting-age Population % of County Population
Ada 307090 72.12
Canyon 132145 65.17
Kootenai 111715 75.63
Bonneville 71840 65.91
Bannock 59380 70.85
Twin Falls 54790 67.68
Bonner 32585 78.73
Nez Perce 31185 77.97
Latah 30090 77.96
Bingham 29025 64.13
Madison 26625 69.85
Elmore 17940 68.72
Jefferson 16900 62.37
Payette 15790 69.33
Blaine 14655 68.40
Cassia 13930 59.43
Jerome 12990 57.24
Idaho 12865 79.17
Gem 12505 74.19
Minidoka 12415 61.07
Shoshone 9945 79.24
Gooding 9325 61.53
Fremont 8785 68.13
Boundary 8290 74.42
Franklin 8250 63.39
Valley 8055 81.41
Owyhee 7415 65.30
Washington 7240 72.15
Clearwater 7165 84.00
Benewah 6955 76.68
Teton 6685 64.06
Lemhi 6315 81.54
Boise 5570 80.84
Caribou 4730 69.41
Power 4705 61.14
Bear Lake 4310 72.68
Custer 3380 80.77
Adams 3140 81.24
Lincoln 3130 59.17
Oneida 3015 70.61
Lewis 2915 76.21
Butte 2020 77.99
Camas 675 69.59
Clark 425 44.27