Colorado Citizen Population By County in 2023 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen population for Colorado was 5,521,005 and represented 95.01% of the total Colorado population.

Among all Colorado counties, El Paso had the highest citizen population (715.94K), followed by Denver (661.11K), and Arapahoe (602.83K).

In terms of percentages, Hinsdale had the highest percentage of its population being citizens (100.00%), followed by Huerfano (100.00%), and Jackson (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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Colorado Citizen Population By County in 2023
Colorado Citizen Population By County in 2023
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County Citizen Population % of County Population
El Paso 715935 97.27
Denver 661105 92.63
Arapahoe 602830 91.94
Jefferson 564550 97.38
Adams 473415 90.28
Douglas 355850 96.62
Larimer 354135 97.41
Weld 322470 94.65
Boulder 311860 94.99
Pueblo 164820 97.69
Mesa 153280 97.44
Broomfield 71675 95.43
Garfield 56745 91.47
La Plata 55440 98.84
Eagle 50720 91.59
Fremont 48835 98.87
Montrose 41335 95.53
Delta 30920 98.61
Summit 28810 93.37
Elbert 26825 98.80
Morgan 26710 91.52
Montezuma 25690 98.04
Teller 24560 99.13
Routt 24285 97.18
Logan 20490 97.27
Chaffee 19560 98.42
Otero 18155 98.35
Park 17625 99.35
Gunnison 16965 98.86
Pitkin 16125 94.19
Alamosa 16045 97.15
Grand 15445 97.78
Las Animas 14050 97.64
Archuleta 13450 97.96
Moffat 12875 97.10
Prowers 11355 95.18
Rio Grande 10915 95.79
Clear Creek 9280 99.15
Yuma 8520 85.89
San Miguel 7690 95.83
Conejos 7420 98.47
Huerfano 6945 100.00
Lake 6760 91.23
Kit Carson 6715 95.72
Rio Blanco 6330 97.09
Saguache 6305 96.85
Crowley 5705 99.48
Gilpin 5655 96.26
Lincoln 5430 97.66
Bent 5390 97.56
Custer 5000 98.52
Ouray 4960 98.71
Washington 4720 97.52
Phillips 4120 91.76
Costilla 3425 95.94
Baca 3380 97.69
Dolores 2375 99.58
Sedgwick 2280 97.23
Cheyenne 1635 94.51
Jackson 1420 100.00
Kiowa 1315 97.05
Hinsdale 940 100.00
Mineral 800 100.00
San Juan 635 92.03