Idaho Citizen Population By County in 2024 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen population for Idaho was 1,871,962 and represented 96.78% of the total Idaho population.

Among all Idaho counties, Ada had the highest citizen population (504.18K), followed by Canyon (238.40K), and Kootenai (180.67K).

In terms of percentages, Adams had the highest percentage of its population being citizens (99.68%), followed by Benewah (99.65%), and Lemhi (99.62%).

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

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 2024

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

See this for other years:

Idaho Citizen Population By County in 2024

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County	Citizen Population	% of County Population
Ada	504184	97.16
Canyon	238398	95.06
Kootenai	180667	99.27
Bonneville	126468	97.64
Twin Falls	89581	95.57
Bannock	87836	98.19
Madison	52248	95.66
Bonner	50501	98.93
Bingham	48121	96.90
Nez Perce	42485	99.51
Latah	40163	97.84
Jefferson	32387	97.70
Elmore	27864	95.03
Payette	26040	97.27
Cassia	23724	93.09
Blaine	23014	92.24
Jerome	21691	86.17
Minidoka	20897	94.10
Gem	19858	96.32
Idaho	17302	99.25
Franklin	14932	99.18
Gooding	14525	91.17
Shoshone	13670	99.15
Fremont	13468	96.58
Boundary	12685	96.33
Valley	12297	99.25
Owyhee	11463	91.68
Teton	11434	92.02
Washington	10739	96.37
Benewah	10110	99.65
Clearwater	8881	98.55
Lemhi	8221	99.62
Boise	8198	99.13
Power	7538	92.67
Caribou	6918	96.66
Bear Lake	6608	99.40
Lincoln	4809	89.75
Oneida	4749	99.62
Adams	4728	99.68
Custer	4444	99.40
Lewis	3670	99.59
Butte	2619	97.65
Camas	1113	98.85
Clark	722	85.04