Colorado Citizen Population By County in 2011 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen population for Colorado was 4,647,420 and represented 93.58% of the total Colorado population.

Among all Colorado counties, El Paso had the highest citizen population (589.29K), followed by Denver (522.08K), and Jefferson (514.79K).

In terms of percentages, Hinsdale had the highest percentage of its population being citizens (100.00%), followed by Archuleta (99.55%), and Dolores (99.51%).

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.

See this for other years:
Colorado Citizen Population By County in 2011
Colorado Citizen Population By County in 2011
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County Citizen Population % of County Population
El Paso 589295 96.39
Denver 522080 88.41
Jefferson 514785 96.72
Arapahoe 508665 90.27
Adams 387310 89.18
Larimer 286065 96.61
Douglas 272245 97.01
Boulder 272035 92.78
Weld 232515 93.59
Pueblo 154375 97.74
Mesa 141070 97.45
Broomfield 52225 95.67
La Plata 49835 98.06
Garfield 48450 86.99
Fremont 45465 96.65
Eagle 43245 84.04
Montrose 38245 93.72
Delta 29640 96.66
Montezuma 25020 98.62
Morgan 24765 88.62
Summit 24695 89.82
Teller 22780 98.89
Routt 22625 97.52
Elbert 22540 98.60
Logan 21475 95.81
Otero 18255 97.13
Chaffee 17360 98.05
Park 16110 99.08
Pitkin 15325 91.71
Las Animas 15185 97.65
Alamosa 14655 95.19
Gunnison 14620 95.71
Grand 14035 95.90
Moffat 12930 95.18
Archuleta 12095 99.55
Prowers 11630 92.19
Rio Grande 11345 95.22
Clear Creek 8935 98.35
Yuma 8935 89.71
Conejos 7965 96.78
Kit Carson 7565 92.48
San Miguel 6865 92.96
Huerfano 6545 95.83
Rio Blanco 6355 96.07
Lake 6160 87.87
Bent 5980 97.00
Saguache 5615 91.08
Crowley 5520 94.12
Lincoln 5190 95.06
Gilpin 5140 98.09
Washington 4565 96.92
Ouray 4290 98.17
Phillips 4105 93.51
Custer 3810 98.83
Baca 3755 98.69
Costilla 3230 90.86
Sedgwick 2335 97.70
Cheyenne 2130 94.88
Dolores 2035 99.51
Kiowa 1690 97.69
Jackson 1475 98.66
San Juan 780 97.50
Hinsdale 730 100.00
Mineral 715 98.62