Colorado Citizen Population By County in 2013 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2013, the citizen population for Colorado was 4,805,915 and represented 93.88% of the total Colorado population.

Among all Colorado counties, El Paso had the highest citizen population (612.18K), followed by Denver (552.39K), and Arapahoe (531.89K).

In terms of percentages, Mineral had the highest percentage of its population being citizens (100.00%), followed by Dolores (99.71%), and Hinsdale (99.38%).

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 2013
Colorado Citizen Population By County in 2013
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County Citizen Population % of County Population
El Paso 612185 96.49
Denver 552390 89.20
Arapahoe 531885 90.87
Jefferson 523030 96.74
Adams 404810 89.55
Larimer 295260 96.55
Douglas 284145 96.97
Boulder 280845 93.28
Weld 244135 94.34
Pueblo 156355 97.69
Mesa 143535 97.36
Broomfield 54970 96.15
La Plata 51025 98.05
Garfield 49720 87.71
Fremont 45500 97.12
Eagle 44310 84.97
Montrose 38900 94.83
Delta 29750 97.03
Summit 25590 91.10
Morgan 25520 90.15
Montezuma 25070 98.28
Teller 23075 99.14
Routt 22830 97.52
Elbert 22700 97.45
Logan 21645 95.75
Otero 18180 96.63
Chaffee 17730 98.15
Park 15840 98.20
Pitkin 15760 91.76
Alamosa 15060 94.51
Gunnison 14975 97.11
Las Animas 14815 97.89
Grand 14095 96.97
Moffat 12910 96.02
Archuleta 11895 98.23
Rio Grande 11440 96.01
Prowers 11315 90.70
Yuma 9175 90.89
Clear Creek 8860 97.90
Conejos 8065 97.70
Kit Carson 7520 91.82
San Miguel 7000 93.40
Lake 6485 88.47
Rio Blanco 6470 95.57
Huerfano 6420 96.91
Bent 5865 95.52
Saguache 5685 91.69
Gilpin 5420 99.00
Crowley 5335 94.76
Lincoln 5165 94.95
Washington 4725 98.54
Ouray 4395 98.21
Custer 4195 98.82
Phillips 3995 91.11
Baca 3690 98.14
Costilla 3255 91.69
Sedgwick 2320 97.68
Cheyenne 2045 93.38
Dolores 1705 99.71
Kiowa 1390 97.54
Jackson 1330 97.08
Hinsdale 805 99.38
Mineral 760 100.00
San Juan 650 98.49