Montana Citizen Voting-age Population By County in 2019 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2019, the citizen voting-age population for Montana was 812,540 and represented 77.34% of the total Montana population.
Among all Montana counties, Yellowstone had the highest citizen voting-age population (120.24K), followed by Missoula (93.48K), and Gallatin (84.79K).
In terms of percentages, Golden Valley had the highest percentage of its population being citizens of voting-age (85.62%), followed by Powell (84.68%), and Treasure (83.58%).
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 | 120240 | 75.62 |
| Missoula | 93475 | 79.68 |
| Gallatin | 84790 | 78.46 |
| Flathead | 77065 | 77.14 |
| Cascade | 62770 | 76.90 |
| Lewis and Clark | 52860 | 77.96 |
| Ravalli | 34020 | 80.03 |
| Silver Bow | 27205 | 78.24 |
| Lake | 22570 | 75.20 |
| Lincoln | 15790 | 80.83 |
| Park | 13285 | 81.25 |
| Hill | 11805 | 71.83 |
| Sanders | 9495 | 81.29 |
| Jefferson | 9350 | 78.47 |
| Glacier | 9300 | 67.74 |
| Custer | 9135 | 77.88 |
| Fergus | 8780 | 78.25 |
| Big Horn | 8745 | 65.33 |
| Carbon | 8695 | 82.07 |
| Richland | 8210 | 73.30 |
| Beaverhead | 7620 | 80.94 |
| Deer Lodge | 7590 | 83.36 |
| Roosevelt | 7350 | 65.77 |
| Stillwater | 7320 | 77.34 |
| Dawson | 7030 | 77.98 |
| Madison | 6775 | 81.63 |
| Rosebud | 6415 | 70.11 |
| Powell | 5805 | 84.68 |
| Valley | 5795 | 77.58 |
| Broadwater | 4750 | 79.90 |
| Blaine | 4710 | 70.09 |
| Teton | 4595 | 75.51 |
| Pondera | 4485 | 74.81 |
| Chouteau | 4320 | 75.39 |
| Toole | 3935 | 80.47 |
| Musselshell | 3805 | 79.85 |
| Mineral | 3460 | 81.41 |
| Phillips | 3105 | 76.20 |
| Sweet Grass | 2955 | 80.52 |
| Sheridan | 2730 | 78.34 |
| Granite | 2680 | 80.97 |
| Fallon | 2125 | 72.77 |
| Liberty | 1820 | 77.45 |
| Judith Basin | 1555 | 79.54 |
| Wheatland | 1555 | 72.66 |
| Meagher | 1490 | 78.84 |
| McCone | 1360 | 75.98 |
| Daniels | 1330 | 76.88 |
| Powder River | 1330 | 82.87 |
| Carter | 1045 | 78.57 |
| Prairie | 945 | 75.60 |
| Garfield | 825 | 79.71 |
| Wibaux | 815 | 72.77 |
| Golden Valley | 625 | 85.62 |
| Treasure | 560 | 83.58 |
| Petroleum | 360 | 79.12 |
