Idaho Citizen Voting-age Population By County in 2012 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2012, the citizen voting-age population for Idaho was 1,087,265 and represented 69.35% of the total Idaho population.

Among all Idaho counties, Ada had the highest citizen voting-age population (279.75K), followed by Canyon (119.96K), and Kootenai (103.67K).

In terms of percentages, Clearwater had the highest percentage of its population being citizens of voting-age (82.03%), followed by Adams (81.01%), and Lemhi (80.48%).

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 2012
Idaho Citizen Voting-age Population By County in 2012
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County Citizen Voting-age Population % of County Population
Ada 279745 70.83
Canyon 119960 63.34
Kootenai 103665 74.53
Bonneville 68455 65.71
Bannock 59015 71.46
Twin Falls 51870 67.26
Bonner 31510 77.22
Nez Perce 30390 77.48
Latah 29460 78.84
Bingham 28300 62.46
Madison 26515 71.07
Elmore 17870 67.04
Jefferson 16225 62.55
Payette 15440 68.27
Blaine 13995 65.63
Cassia 13860 60.75
Jerome 12900 58.27
Idaho 12735 78.54
Minidoka 12510 62.83
Gem 12210 72.81
Shoshone 10045 78.51
Gooding 9050 59.05
Fremont 8470 64.53
Franklin 8125 63.78
Boundary 7970 73.42
Valley 7840 80.04
Owyhee 7180 62.54
Washington 7125 70.23
Clearwater 7120 82.03
Benewah 6985 75.55
Lemhi 6350 80.48
Teton 6275 62.72
Boise 5430 77.41
Caribou 4795 69.80
Power 4575 59.30
Bear Lake 4330 72.47
Custer 3400 78.34
Adams 3220 81.01
Lincoln 3090 59.83
Oneida 3020 71.31
Lewis 2960 77.49
Butte 2045 72.26
Camas 885 69.41
Clark 355 45.51