Colorado / Counties by Population

Colorado Counties by Population

Below are the 64 Colorado counties sorted by population from 1 to 64 . The population data are from the 2020 Census Redistricting dataset. If 2020 Census data are not available for a geography, then the population data are from the Census’ 2019 American Community Survey. You can copy and paste this list directly into your favorite spreadsheet program. Don't you just adore lovely numbers listed nicely in columns & rows? We do!

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Rank County Population
1 El Paso County 730,395
2 Denver County 715,522
3 Arapahoe County 655,070
4 Jefferson County 582,910
5 Adams County 519,572
6 Larimer County 359,066
7 Douglas County 357,978
8 Boulder County 330,758
9 Weld County 328,981
10 Pueblo County 168,162
11 Mesa County 155,703
12 Broomfield County 74,112
13 Garfield County 61,685
14 Eagle County 55,731
15 La Plata County 55,638
16 Fremont County 48,939
17 Montrose County 42,679
18 Delta County 31,196
19 Summit County 31,055
20 Morgan County 29,111
21 Elbert County 26,062
22 Montezuma County 25,849
23 Routt County 24,829
24 Teller County 24,710
25 Logan County 21,528
26 Chaffee County 19,476
27 Otero County 18,690
28 Park County 17,390
29 Pitkin County 17,358
30 Gunnison County 16,918
31 Alamosa County 16,376
32 Grand County 15,717
33 Las Animas County 14,555
34 Archuleta County 13,359
35 Moffat County 13,292
36 Prowers County 11,999
37 Rio Grande County 11,539
38 Yuma County 9,988
39 Clear Creek County 9,397
40 San Miguel County 8,072
41 Conejos County 7,461
42 Lake County 7,436
43 Kit Carson County 7,087
44 Huerfano County 6,820
45 Rio Blanco County 6,529
46 Saguache County 6,368
47 Crowley County 5,922
48 Gilpin County 5,808
49 Lincoln County 5,675
50 Bent County 5,650
51 Ouray County 4,874
52 Washington County 4,817
53 Custer County 4,704
54 Phillips County 4,530
55 Baca County 3,506
56 Costilla County 3,499
57 Sedgwick County 2,404
58 Dolores County 2,326
59 Cheyenne County 1,748
60 Kiowa County 1,446
61 Jackson County 1,379
62 Mineral County 865
63 Hinsdale County 788
64 San Juan County 705

United States Census Bureau. B01001 SEX BY AGE, 2019 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 10 December 2020. http://www.census.gov/.

United States Census Bureau. "P2 Hispanic or Latino, and Not Hispanic or Latino by Race." 2020 Census State Redistricting Data (Public Law 94-171) Summary File. U.S. Census Bureau, 2020 Census. Web. 12 August 2021. https://www.census.gov/.

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