Colorado Citizen Voting-age Population By County in 2018 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2018, the citizen voting-age population for Colorado was 3,979,325 and represented 71.94% of the total Colorado population.
Among all Colorado counties, El Paso had the highest citizen voting-age population (498.09K), followed by Denver (490.36K), and Jefferson (437.98K).
In terms of percentages, Mineral had the highest percentage of its population being citizens of voting-age (90.30%), followed by San Juan (87.16%), and Ouray (84.22%).
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 |
|---|---|---|
| El Paso | 498090 | 72.38 |
| Denver | 490355 | 70.72 |
| Jefferson | 437980 | 76.78 |
| Arapahoe | 435275 | 68.37 |
| Adams | 314725 | 63.31 |
| Larimer | 261010 | 77.19 |
| Boulder | 239845 | 74.71 |
| Douglas | 229690 | 69.90 |
| Weld | 200860 | 68.06 |
| Pueblo | 123880 | 75.22 |
| Mesa | 114230 | 76.15 |
| Broomfield | 47750 | 72.22 |
| La Plata | 43895 | 79.66 |
| Fremont | 38545 | 82.01 |
| Garfield | 37365 | 63.83 |
| Eagle | 35050 | 64.48 |
| Montrose | 30955 | 75.01 |
| Delta | 23405 | 77.13 |
| Summit | 23395 | 76.88 |
| Montezuma | 19890 | 76.77 |
| Routt | 19540 | 78.55 |
| Teller | 19480 | 80.78 |
| Elbert | 19405 | 77.13 |
| Morgan | 18245 | 64.57 |
| Logan | 16330 | 75.29 |
| Chaffee | 15900 | 82.96 |
| Park | 14145 | 81.34 |
| Pitkin | 13805 | 77.08 |
| Otero | 13340 | 72.80 |
| Gunnison | 13195 | 79.80 |
| Grand | 11870 | 78.79 |
| Alamosa | 11700 | 71.15 |
| Las Animas | 11125 | 78.46 |
| Archuleta | 10360 | 80.25 |
| Moffat | 9300 | 71.21 |
| Rio Grande | 8295 | 73.08 |
| Prowers | 8175 | 67.84 |
| Clear Creek | 7645 | 81.50 |
| Yuma | 6570 | 65.24 |
| San Miguel | 6090 | 76.41 |
| Lake | 5815 | 76.66 |
| Conejos | 5805 | 71.31 |
| Huerfano | 5420 | 82.31 |
| Kit Carson | 5360 | 70.20 |
| Gilpin | 4925 | 83.12 |
| Bent | 4695 | 80.81 |
| Rio Blanco | 4690 | 72.54 |
| Crowley | 4655 | 82.68 |
| Saguache | 4630 | 71.56 |
| Lincoln | 4240 | 76.40 |
| Ouray | 3975 | 84.22 |
| Custer | 3835 | 82.65 |
| Washington | 3640 | 75.21 |
| Phillips | 2865 | 66.32 |
| Costilla | 2815 | 76.39 |
| Baca | 2745 | 77.00 |
| Sedgwick | 1770 | 75.32 |
| Dolores | 1470 | 79.89 |
| Cheyenne | 1270 | 62.26 |
| Kiowa | 1030 | 71.03 |
| Jackson | 1000 | 77.22 |
| Mineral | 745 | 90.30 |
| Hinsdale | 735 | 83.52 |
| San Juan | 475 | 87.16 |
