Montana Citizen Voting-age Population By County in 2015 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen voting-age population for Montana was 781,250 and represented 76.99% of the total Montana population.
Among all Montana counties, Yellowstone had the highest citizen voting-age population (116.22K), followed by Missoula (88.72K), and Gallatin (74.11K).
In terms of percentages, Powell had the highest percentage of its population being citizens of voting-age (84.80%), followed by Powder River (83.28%), and Deer Lodge (82.79%).
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 | 116220 | 75.62 |
| Missoula | 88720 | 79.24 |
| Gallatin | 74110 | 77.75 |
| Flathead | 71565 | 76.68 |
| Cascade | 62915 | 76.64 |
| Lewis and Clark | 50585 | 77.40 |
| Ravalli | 32175 | 78.81 |
| Silver Bow | 26990 | 78.12 |
| Lake | 21700 | 74.43 |
| Lincoln | 15625 | 80.81 |
| Park | 12660 | 80.59 |
| Hill | 11950 | 72.32 |
| Custer | 9295 | 77.82 |
| Sanders | 9145 | 80.61 |
| Glacier | 9110 | 66.64 |
| Fergus | 9035 | 78.77 |
| Jefferson | 8955 | 77.87 |
| Big Horn | 8675 | 66.02 |
| Richland | 8260 | 74.21 |
| Carbon | 8230 | 80.14 |
| Deer Lodge | 7625 | 82.79 |
| Roosevelt | 7510 | 67.84 |
| Beaverhead | 7310 | 78.69 |
| Dawson | 7300 | 77.95 |
| Stillwater | 7190 | 77.40 |
| Rosebud | 6600 | 70.59 |
| Madison | 6395 | 82.36 |
| Powell | 5915 | 84.80 |
| Valley | 5815 | 76.77 |
| Pondera | 4605 | 74.21 |
| Blaine | 4595 | 69.62 |
| Teton | 4585 | 75.47 |
| Broadwater | 4435 | 77.94 |
| Chouteau | 4310 | 73.61 |
| Toole | 4125 | 80.10 |
| Musselshell | 3675 | 76.72 |
| Mineral | 3465 | 81.72 |
| Phillips | 3215 | 77.19 |
| Sheridan | 2835 | 78.10 |
| Sweet Grass | 2725 | 74.97 |
| Granite | 2610 | 82.33 |
| Fallon | 2265 | 74.14 |
| Liberty | 1865 | 78.69 |
| Wheatland | 1645 | 77.78 |
| Judith Basin | 1640 | 82.21 |
| Meagher | 1510 | 79.47 |
| Daniels | 1435 | 81.53 |
| Powder River | 1420 | 83.28 |
| McCone | 1400 | 80.93 |
| Prairie | 1050 | 76.64 |
| Carter | 990 | 80.82 |
| Garfield | 830 | 79.43 |
| Wibaux | 785 | 79.69 |
| Treasure | 665 | 82.10 |
| Golden Valley | 620 | 82.12 |
| Petroleum | 360 | 80.90 |
