Montana Citizen Voting-age Population By County in 2017 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen voting-age population for Montana was 794,085 and represented 77.11% of the total Montana population.
Among all Montana counties, Yellowstone had the highest citizen voting-age population (117.97K), followed by Missoula (90.74K), and Gallatin (78.52K).
In terms of percentages, Powell had the highest percentage of its population being citizens of voting-age (85.55%), followed by Deer Lodge (83.95%), and Liberty (83.30%).
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 | 117965 | 75.46 |
| Missoula | 90740 | 79.44 |
| Gallatin | 78520 | 77.95 |
| Flathead | 74055 | 77.02 |
| Cascade | 62745 | 76.69 |
| Lewis and Clark | 51630 | 77.89 |
| Ravalli | 32915 | 79.53 |
| Silver Bow | 27065 | 78.42 |
| Lake | 22020 | 74.59 |
| Lincoln | 15590 | 80.99 |
| Park | 12795 | 79.97 |
| Hill | 11830 | 71.83 |
| Sanders | 9245 | 80.99 |
| Custer | 9230 | 77.60 |
| Glacier | 9205 | 67.31 |
| Jefferson | 9095 | 78.24 |
| Fergus | 8860 | 78.23 |
| Big Horn | 8750 | 65.84 |
| Carbon | 8515 | 81.37 |
| Richland | 8390 | 73.56 |
| Deer Lodge | 7665 | 83.95 |
| Beaverhead | 7525 | 80.40 |
| Roosevelt | 7470 | 66.58 |
| Stillwater | 7225 | 77.36 |
| Dawson | 7120 | 76.35 |
| Rosebud | 6540 | 70.40 |
| Madison | 6480 | 82.03 |
| Powell | 5860 | 85.55 |
| Valley | 5835 | 77.18 |
| Blaine | 4625 | 69.60 |
| Teton | 4600 | 76.16 |
| Broadwater | 4585 | 79.67 |
| Pondera | 4495 | 73.93 |
| Chouteau | 4365 | 75.13 |
| Toole | 3995 | 79.42 |
| Musselshell | 3725 | 78.17 |
| Mineral | 3425 | 81.65 |
| Phillips | 3170 | 76.57 |
| Sweet Grass | 2800 | 76.82 |
| Sheridan | 2775 | 77.73 |
| Granite | 2570 | 80.19 |
| Fallon | 2135 | 72.99 |
| Liberty | 1870 | 83.30 |
| Judith Basin | 1635 | 83.21 |
| Wheatland | 1545 | 73.22 |
| Meagher | 1470 | 73.50 |
| Daniels | 1395 | 77.93 |
| Powder River | 1325 | 82.30 |
| McCone | 1300 | 75.15 |
| Carter | 1065 | 80.68 |
| Prairie | 1020 | 76.98 |
| Garfield | 860 | 79.26 |
| Wibaux | 855 | 76.34 |
| Treasure | 635 | 80.38 |
| Golden Valley | 595 | 79.87 |
| Petroleum | 375 | 82.42 |
