Montana Citizen Voting-age Population By County in 2023 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen voting-age population for Montana was 859,640 and represented 77.79% of the total Montana population.
Among all Montana counties, Yellowstone had the highest citizen voting-age population (127.07K), followed by Gallatin (96.43K), and Missoula (96.07K).
In terms of percentages, Deer Lodge had the highest percentage of its population being citizens of voting-age (87.54%), followed by Petroleum (87.50%), and Meagher (86.87%).
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 | 127065 | 75.93 |
| Gallatin | 96430 | 78.92 |
| Missoula | 96065 | 80.30 |
| Flathead | 83645 | 77.13 |
| Cascade | 65140 | 77.00 |
| Lewis and Clark | 56575 | 77.95 |
| Ravalli | 36895 | 80.55 |
| Silver Bow | 27975 | 78.60 |
| Lake | 24485 | 76.34 |
| Lincoln | 16595 | 80.34 |
| Park | 14385 | 82.27 |
| Hill | 11590 | 71.28 |
| Sanders | 10645 | 82.30 |
| Jefferson | 9855 | 78.84 |
| Glacier | 9580 | 69.85 |
| Custer | 9480 | 79.40 |
| Fergus | 9135 | 78.89 |
| Carbon | 8895 | 81.79 |
| Big Horn | 8740 | 67.41 |
| Deer Lodge | 8325 | 87.54 |
| Richland | 8250 | 72.82 |
| Beaverhead | 7860 | 81.96 |
| Madison | 7465 | 83.18 |
| Stillwater | 7120 | 78.67 |
| Roosevelt | 7065 | 66.25 |
| Dawson | 6965 | 78.48 |
| Powell | 5970 | 84.92 |
| Broadwater | 5860 | 80.16 |
| Rosebud | 5800 | 70.43 |
| Valley | 5800 | 76.92 |
| Blaine | 4900 | 70.05 |
| Teton | 4705 | 74.80 |
| Pondera | 4550 | 75.71 |
| Chouteau | 4500 | 76.40 |
| Musselshell | 4015 | 79.19 |
| Toole | 3940 | 78.33 |
| Mineral | 3785 | 78.94 |
| Phillips | 3190 | 75.50 |
| Sweet Grass | 2950 | 79.41 |
| Granite | 2855 | 83.48 |
| Sheridan | 2845 | 77.42 |
| Fallon | 2105 | 74.78 |
| Meagher | 1720 | 86.87 |
| Wheatland | 1600 | 78.05 |
| Judith Basin | 1565 | 76.16 |
| McCone | 1475 | 81.04 |
| Powder River | 1400 | 79.55 |
| Liberty | 1375 | 69.80 |
| Daniels | 1210 | 79.34 |
| Carter | 1120 | 82.35 |
| Prairie | 930 | 74.40 |
| Wibaux | 825 | 71.74 |
| Golden Valley | 720 | 85.71 |
| Garfield | 715 | 76.06 |
| Treasure | 625 | 82.24 |
| Petroleum | 350 | 87.50 |
