Colorado 2019 Population By County

Updated on December 2, 2021.

According to the US Census Bureau population estimates, there were 5,758,486 people living in Colorado in 2019. Denver County was the most populated county with 725,508 residents, followed by El Paso County with 721,929 residents, and Arapahoe County with 656,051 residents. San Juan County with a population of 723 was the least populated county in Colorado in 2019.

Use the map below to interactively explore the population of each county in Colorado in 2019. The data can also be explored further by sorting and filtering with the table below.

Colorado 2019 Population By County
See also population estimate for other years:
Table of Colorado 2019 Population By County
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County Population % of State Population
Adams 516575 8.97
Alamosa 16200 0.28
Arapahoe 656051 11.39
Archuleta 13928 0.24
Baca 3620 0.06
Bent 5578 0.10
Boulder 326020 5.66
Broomfield 70617 1.23
Chaffee 20319 0.35
Cheyenne 1824 0.03
Clear Creek 9598 0.17
Conejos 8169 0.14
Costilla 3872 0.07
Crowley 5989 0.10
Custer 5119 0.09
Delta 31021 0.54
Denver 725508 12.60
Dolores 2042 0.04
Douglas 351842 6.11
Eagle 55183 0.96
Elbert 26707 0.46
El Paso 721929 12.54
Fremont 48009 0.83
Garfield 60031 1.04
Gilpin 6232 0.11
Grand 15748 0.27
Gunnison 17480 0.30
Hinsdale 789 0.01
Huerfano 6868 0.12
Jackson 1397 0.02
Jefferson 582800 10.12
Kiowa 1417 0.03
Kit Carson 7161 0.12
Lake 8072 0.14
La Plata 56440 0.98
Larimer 357241 6.20
Las Animas 14415 0.25
Lincoln 5694 0.10
Logan 22409 0.39
Mesa 154552 2.68
Mineral 756 0.01
Moffat 13209 0.23
Montezuma 26369 0.46
Montrose 42791 0.74
Morgan 28938 0.50
Otero 18243 0.32
Ouray 5005 0.09
Park 18881 0.33
Phillips 4359 0.08
Pitkin 17902 0.31
Prowers 12106 0.21
Pueblo 168409 2.93
Rio Blanco 6350 0.11
Rio Grande 11277 0.20
Routt 25579 0.44
Saguache 6829 0.12
San Juan 723 0.01
San Miguel 8169 0.14
Sedgwick 2274 0.04
Summit 30851 0.54
Teller 25408 0.44
Washington 4869 0.09
Weld 324703 5.64
Yuma 10020 0.17