Colorado Citizen Population By County in 2017 (ACS-5Yrs)
Updated on March 28, 2026.
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen population for Colorado was 5,116,325 and represented 94.11% of the total Colorado population.
Among all Colorado counties, El Paso had the highest citizen population (652.40K), followed by Denver (608.55K), and Arapahoe (573.40K).
In terms of percentages, Hinsdale had the highest percentage of its population being citizens (100.00%), followed by Mineral (100.00%), and San Juan (100.00%).
The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.
You can see similar information for other states and by state for the United States.
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Data Source: US Census - ACS 5-Year (CVAP).
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Colorado Citizen Population By County in 2017
Colorado Citizen Population By County in 2017
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| County | Citizen Population | % of County Population |
|---|---|---|
| El Paso | 652400 | 96.68 |
| Denver | 608555 | 89.70 |
| Arapahoe | 573395 | 91.51 |
| Jefferson | 545425 | 96.70 |
| Adams | 436500 | 89.47 |
| Larimer | 321080 | 97.01 |
| Douglas | 310360 | 96.70 |
| Boulder | 297140 | 93.80 |
| Weld | 269130 | 94.19 |
| Pueblo | 159600 | 97.69 |
| Mesa | 145995 | 98.12 |
| Broomfield | 61410 | 95.53 |
| La Plata | 53290 | 97.83 |
| Garfield | 51300 | 88.53 |
| Eagle | 46505 | 86.56 |
| Fremont | 45845 | 98.38 |
| Montrose | 39245 | 95.93 |
| Delta | 29470 | 97.53 |
| Summit | 27525 | 92.61 |
| Montezuma | 25480 | 98.88 |
| Morgan | 25380 | 90.24 |
| Elbert | 24175 | 98.45 |
| Routt | 23550 | 96.68 |
| Teller | 23530 | 98.99 |
| Logan | 21190 | 96.82 |
| Chaffee | 18505 | 98.33 |
| Otero | 17545 | 95.74 |
| Park | 16550 | 97.93 |
| Pitkin | 16365 | 92.22 |
| Gunnison | 15890 | 98.00 |
| Alamosa | 15115 | 92.48 |
| Grand | 14130 | 95.51 |
| Las Animas | 13690 | 96.75 |
| Moffat | 12660 | 96.97 |
| Archuleta | 12160 | 96.59 |
| Prowers | 11120 | 92.02 |
| Rio Grande | 10940 | 95.71 |
| Yuma | 9335 | 92.33 |
| Clear Creek | 9010 | 97.35 |
| Conejos | 7990 | 98.10 |
| San Miguel | 7405 | 94.88 |
| Kit Carson | 7255 | 92.48 |
| Lake | 6945 | 92.85 |
| Huerfano | 6455 | 99.31 |
| Rio Blanco | 6430 | 98.09 |
| Saguache | 5865 | 92.51 |
| Gilpin | 5740 | 99.05 |
| Bent | 5555 | 95.69 |
| Lincoln | 5290 | 95.83 |
| Crowley | 5225 | 94.74 |
| Washington | 4710 | 97.92 |
| Ouray | 4590 | 98.60 |
| Custer | 4475 | 99.33 |
| Phillips | 4050 | 93.64 |
| Baca | 3470 | 96.93 |
| Costilla | 3455 | 95.18 |
| Sedgwick | 2310 | 98.09 |
| Cheyenne | 2005 | 94.35 |
| Dolores | 1725 | 99.42 |
| Kiowa | 1365 | 99.64 |
| Jackson | 1290 | 94.16 |
| Mineral | 835 | 100.00 |
| Hinsdale | 820 | 100.00 |
| San Juan | 570 | 100.00 |
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