Where to vote: Montana 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+ |
|---|---|---|---|---|---|
| Beaverhead County | 7,505 | 6,376 | 1,120 | 7,864 | 81.1% |
| Big Horn County | 7,702 | 6,275 | 1,367 | 8,795 | 71.3% |
| Blaine County | 4,236 | 3,578 | 626 | 4,875 | 73.4% |
| Broadwater County | 6,166 | 5,432 | 719 | 6,110 | 88.9% |
| Carbon County | 9,075 | 8,218 | 854 | 9,163 | 89.7% |
| Carter County | 1,010 | 938 | 72 | 1,074 | 87.3% |
| Cascade County | 51,988 | 44,333 | 7,625 | 65,152 | 68.0% |
| Chouteau County | 3,756 | 3,348 | 401 | 4,571 | 73.2% |
| Custer County | 7,533 | 6,638 | 895 | 9,518 | 69.7% |
| Daniels County | 1,156 | 1,051 | 105 | 1,214 | 86.6% |
| Dawson County | 5,798 | 5,179 | 617 | 6,933 | 74.7% |
| Deer Lodge County | 6,147 | 5,552 | 590 | 8,443 | 65.8% |
| Fallon County | 1,766 | 1,690 | 76 | 2,108 | 80.2% |
| Fergus County | 7,978 | 7,355 | 623 | 9,182 | 80.1% |
| Flathead County | 84,570 | 70,920 | 13,628 | 85,543 | 82.9% |
| Gallatin County | 97,412 | 80,396 | 16,881 | 98,326 | 81.8% |
| Garfield County | 917 | 864 | 53 | 821 | 105.2%* |
| Glacier County | 8,370 | 6,588 | 1,744 | 9,432 | 69.8% |
| Golden Valley County | 603 | 576 | 27 | 733 | 78.6% |
| Granite County | 2,749 | 2,434 | 315 | 2,895 | 84.1% |
| Hill County | 9,327 | 7,938 | 1,340 | 11,517 | 68.9% |
| Jefferson County | 10,168 | 9,235 | 932 | 10,189 | 90.6% |
| Judith Basin County | 1,567 | 1,475 | 92 | 1,557 | 94.7% |
| Lake County | 22,617 | 19,364 | 3,201 | 25,066 | 77.3% |
| Lewis And Clark County | 53,766 | 47,121 | 6,589 | 57,453 | 82.0% |
| Liberty County | 1,210 | 1,129 | 81 | 1,393 | 81.0% |
| Lincoln County | 13,897 | 13,568 | 323 | 17,013 | 79.8% |
| Madison County | 7,968 | 7,367 | 601 | 7,620 | 96.7% |
| Mccone County | 1,249 | 1,199 | 50 | 1,358 | 88.3% |
| Meagher County | 1,458 | 1,293 | 165 | 1,760 | 73.5% |
| Mineral County | 4,166 | 3,321 | 845 | 3,925 | 84.6% |
| Missoula County | 95,347 | 83,235 | 11,943 | 97,174 | 85.7% |
| Musselshell County | 3,874 | 3,413 | 461 | 4,094 | 83.4% |
| Park County | 15,037 | 13,156 | 1,881 | 14,561 | 90.4% |
| Petroleum County | 372 | 366 | 6 | 383 | 95.6% |
| Phillips County | 2,761 | 2,428 | 332 | 3,164 | 76.7% |
| Pondera County | 3,805 | 3,369 | 436 | 4,551 | 74.0% |
| Powder River County | 1,250 | 1,205 | 43 | 1,426 | 84.5% |
| Powell County | 4,218 | 3,663 | 555 | 6,086 | 60.2% |
| Prairie County | 839 | 759 | 80 | 1,035 | 73.3% |
| Ravalli County | 37,186 | 32,749 | 4,426 | 37,740 | 86.8% |
| Richland County | 7,686 | 6,166 | 1,520 | 8,198 | 75.2% |
| Roosevelt County | 6,181 | 5,126 | 998 | 7,009 | 73.1% |
| Rosebud County | 5,139 | 4,364 | 753 | 5,742 | 76.0% |
| Sanders County | 10,886 | 9,418 | 1,466 | 10,986 | 85.7% |
| Sheridan County | 2,478 | 2,131 | 347 | 2,809 | 75.9% |
| Silver Bow County | 23,375 | 21,099 | 2,253 | 28,361 | 74.4% |
| Stillwater County | 7,299 | 6,530 | 768 | 7,236 | 90.2% |
| Sweet Grass County | 2,956 | 2,619 | 337 | 2,967 | 88.3% |
| Teton County | 4,414 | 3,996 | 418 | 4,755 | 84.0% |
| Toole County | 2,687 | 2,353 | 334 | 3,900 | 60.3% |
| Treasure County | 512 | 489 | 23 | 592 | 82.6% |
| Valley County | 5,185 | 4,629 | 553 | 5,800 | 79.8% |
| Wheatland County | 1,445 | 1,318 | 127 | 1,601 | 82.3% |
| Wibaux County | 706 | 627 | 79 | 836 | 75.0% |
| Yellowstone County | 111,105 | 95,575 | 15,126 | 128,573 | 74.3% |
* 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.
Montana does not register voters by party.
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