Colorado Immigrant or Foreign-Born Population By County in 2021 (ACS-5Yrs)

Updated on February 24, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the total immigrant or foreign-born population in Colorado was 545.46K which was 9.53% of Colorado's population. Among all Colorado counties, Arapahoe had the highest immigrant population (101.49K) and immigrants constituted 15.58% of its population, followed by Denver (pop: 100.63K, perc: 14.24%), and then Adams (pop: 77.45K, perc: 15.04%).

On the other hand, the counties with the least number of immigrant population were: Hinsdale (pop: 4, perc: 0.47%), Kiowa (pop: 10, perc: 0.71%), and Mineral (pop: 11, perc: 1.39%),

The chart and table below shows the immigrant or foreign-born population of each county and the percentage of each county's population that are immigrants.

You can see similar information for other states and by state for the United States.

Colorado Immigrant or Foreign-Born Population By County in 2021
Colorado Immigrant or Foreign-Born Population By County in 2021
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County Immigrant Population % of County Population
Adams 77446 15.04
Alamosa 1245 7.60
Arapahoe 101487 15.58
Archuleta 512 3.86
Baca 147 4.18
Bent 173 2.95
Boulder 32536 9.90
Broomfield 7475 10.28
Chaffee 649 3.34
Cheyenne 100 5.91
Clear Creek 346 3.67
Conejos 194 2.56
Costilla 191 5.43
Crowley 133 2.21
Custer 160 3.39
Delta 1478 4.75
Denver 100629 14.24
Dolores 26 1.14
Douglas 27078 7.69
Eagle 8542 15.34
Elbert 682 2.63
El Paso 49374 6.83
Fremont 1195 2.44
Garfield 8747 14.29
Gilpin 284 4.89
Grand 635 4.06
Gunnison 633 3.76
Hinsdale 4 0.47
Huerfano 141 2.08
Jackson 26 1.89
Jefferson 36353 6.27
Kiowa 10 0.71
Kit Carson 434 6.14
Lake 811 10.93
La Plata 1506 2.71
Larimer 20688 5.83
Las Animas 585 4.03
Lincoln 237 4.21
Logan 928 4.26
Mesa 6087 3.94
Mineral 11 1.39
Moffat 785 5.93
Montezuma 924 3.57
Montrose 3212 7.59
Morgan 3756 13.01
Otero 624 3.34
Ouray 90 1.86
Park 278 1.60
Phillips 619 13.77
Pitkin 2090 11.96
Prowers 1267 10.59
Pueblo 5902 3.53
Rio Blanco 296 4.56
Rio Grande 480 4.18
Routt 1262 5.07
Saguache 364 5.72
San Juan 68 9.74
San Miguel 697 8.62
Sedgwick 136 5.53
Summit 1810 5.83
Teller 596 2.42
Washington 126 2.61
Weld 28807 8.94
Yuma 1357 13.65