Idaho Citizen Voting-age Population By County in 2010 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen voting-age population for Idaho was 1,056,005 and represented 69.17% of the total Idaho population.

Among all Idaho counties, Ada had the highest citizen voting-age population (268.59K), followed by Canyon (114.26K), and Kootenai (99.69K).

In terms of percentages, Clearwater had the highest percentage of its population being citizens of voting-age (81.40%), followed by Latah (79.33%), and Lemhi (79.20%).

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 2010

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

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Idaho Citizen Voting-age Population By County in 2010

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County	Citizen Voting-age Population	% of County Population
Ada	268590	70.55
Canyon	114260	62.53
Kootenai	99685	73.92
Bonneville	66035	65.89
Bannock	57420	71.15
Twin Falls	51105	68.20
Bonner	31160	76.54
Nez Perce	29990	77.13
Latah	29070	79.33
Bingham	27970	62.86
Madison	26145	71.80
Elmore	17900	67.12
Payette	15435	68.75
Jefferson	15205	62.00
Blaine	14030	65.78
Cassia	13475	60.95
Minidoka	12505	64.05
Idaho	12495	78.36
Jerome	12470	58.60
Gem	12020	71.63
Shoshone	10070	77.97
Gooding	9190	60.70
Fremont	8350	63.94
Franklin	7875	63.03
Boundary	7850	72.75
Valley	7735	78.57
Clearwater	7135	81.40
Washington	7000	69.27
Benewah	6955	74.79
Owyhee	6835	60.01
Lemhi	6225	79.20
Teton	6055	64.31
Boise	5430	76.26
Caribou	4795	69.49
Power	4525	59.27
Bear Lake	4365	72.45
Custer	3245	75.91
Lincoln	3140	62.55
Adams	3045	77.28
Oneida	2940	69.83
Lewis	2890	76.86
Butte	2165	76.23
Camas	800	65.84
Clark	425	49.71