Idaho Citizen Voting-age Population By County in 2011 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen voting-age population for Idaho was 1,072,405 and represented 69.19% of the total Idaho population.

Among all Idaho counties, Ada had the highest citizen voting-age population (274.20K), followed by Canyon (117.09K), and Kootenai (101.75K).

In terms of percentages, Clearwater had the highest percentage of its population being citizens of voting-age (81.44%), followed by Adams (80.53%), and Lemhi (80.18%).

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 Population By County in 2011

Data Source: US Census - ACS 5-Year (CVAP).

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Idaho Citizen Voting-age Population By County in 2011

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County	Citizen Voting-age Population	% of County Population
Ada	274200	70.64
Canyon	117085	62.74
Kootenai	101750	74.17
Bonneville	67250	65.66
Bannock	58420	71.48
Twin Falls	51365	67.47
Bonner	31380	76.82
Nez Perce	30250	77.39
Latah	29185	79.03
Bingham	28160	62.58
Madison	26655	72.07
Elmore	17750	66.37
Jefferson	15725	62.18
Payette	15520	68.69
Blaine	13885	65.02
Cassia	13630	60.61
Jerome	12725	58.39
Idaho	12660	78.58
Minidoka	12540	63.53
Gem	12175	72.54
Shoshone	10015	77.94
Gooding	9175	60.03
Fremont	8470	64.48
Franklin	7995	63.20
Boundary	7875	72.61
Valley	7790	78.89
Clearwater	7130	81.44
Owyhee	7025	61.35
Washington	7010	69.03
Benewah	6980	75.09
Lemhi	6330	80.18
Teton	6235	63.72
Boise	5480	77.24
Caribou	4795	69.54
Power	4600	59.97
Bear Lake	4335	72.07
Custer	3340	77.40
Adams	3205	80.53
Lincoln	3115	61.02
Oneida	2960	70.06
Lewis	2935	77.54
Butte	2035	71.40
Camas	855	69.23
Clark	405	47.93