Where to vote: Idaho voter lookup (state election office).
Registered voters, 2008-2024
EAVS counts, every two years.
Survey estimate: reported registration, 1978-2024
Current Population Survey: adults who said they were registered.
By county, 2024
EAVS 2024 by county-equivalent; citizens 18+ from the Census Bureau's 2020-2024 estimate.
| County | Registered | Active | Inactive | Citizens 18+ | Active, % of citizens 18+ |
|---|---|---|---|---|---|
| Ada County | 346,361 | 346,361 | 392,085 | 88.3% | |
| Adams County | 3,378 | 3,378 | 3,900 | 86.6% | |
| Bannock County | 52,897 | 52,897 | 65,494 | 80.8% | |
| Bear Lake County | 4,167 | 4,167 | 4,786 | 87.1% | |
| Benewah County | 6,769 | 6,769 | 7,888 | 85.8% | |
| Bingham County | 26,384 | 26,384 | 33,679 | 78.3% | |
| Blaine County | 17,472 | 17,472 | 18,333 | 95.3% | |
| Boise County | 6,511 | 6,511 | 6,925 | 94.0% | |
| Bonner County | 37,335 | 37,335 | 40,585 | 92.0% | |
| Bonneville County | 73,670 | 73,670 | 87,997 | 83.7% | |
| Boundary County | 8,889 | 8,889 | 9,612 | 92.5% | |
| Butte County | 1,755 | 1,755 | 1,957 | 89.7% | |
| Camas County | 880 | 880 | 814 | 108.1%* | |
| Canyon County | 134,650 | 134,650 | 172,390 | 78.1% | |
| Caribou County | 4,390 | 4,390 | 5,026 | 87.3% | |
| Cassia County | 12,021 | 12,021 | 15,998 | 75.1% | |
| Clark County | 438 | 438 | 479 | 91.4% | |
| Clearwater County | 5,531 | 5,531 | 7,537 | 73.4% | |
| Custer County | 3,198 | 3,198 | 3,814 | 83.8% | |
| Elmore County | 14,718 | 14,718 | 20,795 | 70.8% | |
| Franklin County | 8,883 | 8,883 | 10,348 | 85.8% | |
| Fremont County | 8,715 | 8,715 | 10,242 | 85.1% | |
| Gem County | 13,437 | 13,437 | 15,464 | 86.9% | |
| Gooding County | 7,658 | 7,658 | 10,327 | 74.2% | |
| Idaho County | 12,006 | 12,006 | 13,844 | 86.7% | |
| Jefferson County | 19,080 | 19,080 | 21,704 | 87.9% | |
| Jerome County | 10,576 | 10,576 | 14,719 | 71.9% | |
| Kootenai County | 125,242 | 125,242 | 140,010 | 89.5% | |
| Latah County | 27,732 | 27,732 | 32,511 | 85.3% | |
| Lemhi County | 6,198 | 6,198 | 6,823 | 90.8% | |
| Lewis County | 2,507 | 2,507 | 2,858 | 87.7% | |
| Lincoln County | 2,500 | 2,500 | 3,421 | 73.1% | |
| Madison County | 25,306 | 25,306 | 41,299 | 61.3% | |
| Minidoka County | 9,995 | 9,995 | 14,637 | 68.3% | |
| Nez Perce County | 26,591 | 26,591 | 33,461 | 79.5% | |
| Oneida County | 3,231 | 3,231 | 3,460 | 93.4% | |
| Owyhee County | 6,073 | 6,073 | 8,490 | 71.5% | |
| Payette County | 14,591 | 14,591 | 19,217 | 75.9% | |
| Power County | 4,066 | 4,066 | 5,111 | 79.6% | |
| Shoshone County | 8,199 | 8,199 | 10,813 | 75.8% | |
| Teton County | 8,698 | 8,698 | 8,760 | 99.3% | |
| Twin Falls County | 49,842 | 49,842 | 65,287 | 76.3% | |
| Valley County | 9,197 | 9,197 | 9,973 | 92.2% | |
| Washington County | 7,013 | 7,013 | 8,261 | 84.9% |
* Active registered voters exceed the Census estimate of citizens 18+: list maintenance or CVAP margin.
About these figures
Counts are what state election offices report to the US Election Assistance Commission (EAVS) after each November election; questions and state practice change between years. The share is active voters over the Census Bureau's citizen voting-age population estimate (CVAP). The survey line is self-reported (Current Population Survey) and kept separate from the office counts.
Idaho registers voters by party; its figures are not yet collected here.
Registration counts: US Election Assistance Commission, Election Administration and Voting Survey 2008-2024 (public domain).
Citizen voting-age population: US Census Bureau, CVAP special tabulation, 2020-2024 ACS (public domain). Survey estimate: US Census Bureau, Current Population Survey voting and registration tables A-5b and A-3b (public domain).
PollCheck US. Data through November 5, 2026. Photo credits