Montana Citizen Voting-age Population By County in 2024 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for Montana was 871,202 and represented 78.00% of the total Montana population.
Among all Montana counties, Yellowstone had the highest citizen voting-age population (128.57K), followed by Gallatin (98.33K), and Missoula (97.17K).
In terms of percentages, Deer Lodge had the highest percentage of its population being citizens of voting-age (87.99%), followed by Meagher (87.69%), and Powell (86.33%).
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.
| County | Citizen Voting-age Population | % of County Population |
|---|---|---|
| Yellowstone | 128573 | 76.10 |
| Gallatin | 98326 | 79.25 |
| Missoula | 97174 | 80.53 |
| Flathead | 85543 | 77.28 |
| Cascade | 65152 | 77.01 |
| Lewis and Clark | 57453 | 78.21 |
| Ravalli | 37740 | 80.77 |
| Silver Bow | 28361 | 79.25 |
| Lake | 25066 | 76.98 |
| Lincoln | 17013 | 80.33 |
| Park | 14561 | 82.22 |
| Hill | 11517 | 71.28 |
| Sanders | 10986 | 82.69 |
| Jefferson | 10189 | 79.78 |
| Custer | 9518 | 79.59 |
| Glacier | 9432 | 69.16 |
| Fergus | 9182 | 78.57 |
| Carbon | 9163 | 82.46 |
| Big Horn | 8795 | 68.23 |
| Deer Lodge | 8443 | 87.99 |
| Richland | 8198 | 72.98 |
| Beaverhead | 7864 | 80.96 |
| Madison | 7620 | 82.61 |
| Stillwater | 7236 | 78.82 |
| Roosevelt | 7009 | 66.59 |
| Dawson | 6933 | 78.53 |
| Broadwater | 6110 | 79.69 |
| Powell | 6086 | 86.33 |
| Valley | 5800 | 77.14 |
| Rosebud | 5742 | 70.33 |
| Blaine | 4875 | 70.13 |
| Teton | 4755 | 74.83 |
| Chouteau | 4571 | 77.34 |
| Pondera | 4551 | 75.42 |
| Musselshell | 4094 | 79.39 |
| Mineral | 3925 | 79.20 |
| Toole | 3900 | 77.05 |
| Phillips | 3164 | 74.94 |
| Sweet Grass | 2967 | 79.76 |
| Granite | 2895 | 83.62 |
| Sheridan | 2809 | 76.62 |
| Fallon | 2108 | 76.43 |
| Meagher | 1760 | 87.69 |
| Wheatland | 1601 | 77.76 |
| Judith Basin | 1557 | 75.22 |
| Powder River | 1426 | 78.61 |
| Liberty | 1393 | 71.29 |
| McCone | 1358 | 81.27 |
| Daniels | 1214 | 81.42 |
| Carter | 1074 | 82.11 |
| Prairie | 1035 | 82.73 |
| Wibaux | 836 | 70.13 |
| Garfield | 821 | 75.11 |
| Golden Valley | 733 | 81.63 |
| Treasure | 592 | 80.99 |
| Petroleum | 383 | 85.68 |
