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 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 Denver County 715,878
2 El Paso County 710,499
3 Arapahoe County 649,980
4 Jefferson County 578,795
5 Adams County 509,844
6 Larimer County 350,523
7 Douglas County 344,280
8 Boulder County 324,682
9 Weld County 315,389
10 Pueblo County 167,412
11 Mesa County 152,962
12 Broomfield County 69,444
13 Garfield County 59,605
14 La Plata County 56,138
15 Eagle County 54,960
16 Fremont County 47,725
17 Montrose County 42,280
18 Delta County 30,758
19 Summit County 30,735
20 Morgan County 28,617
21 Montezuma County 26,266
22 Elbert County 26,230
23 Routt County 25,317
24 Teller County 24,981
25 Logan County 22,282
26 Chaffee County 19,977
27 Park County 18,345
28 Otero County 18,284
29 Pitkin County 17,980
30 Gunnison County 17,119
31 Alamosa County 16,153
32 Grand County 15,536
33 Las Animas County 14,323
34 Archuleta County 13,588
35 Moffat County 13,150
36 Prowers County 12,035
37 Rio Grande County 11,300
38 Yuma County 10,013
39 Clear Creek County 9,533
40 Conejos County 8,130
41 San Miguel County 8,110
42 Lake County 7,845
43 Kit Carson County 7,246
44 Huerfano County 6,769
45 Saguache County 6,730
46 Rio Blanco County 6,369
47 Gilpin County 6,108
48 Crowley County 5,733
49 Bent County 5,677
50 Lincoln County 5,608
51 Custer County 4,941
52 Ouray County 4,890
53 Washington County 4,869
54 Phillips County 4,343
55 Costilla County 3,810
56 Baca County 3,570
57 Sedgwick County 2,306
58 Cheyenne County 1,999
59 Dolores County 1,896
60 Kiowa County 1,463
61 Jackson County 1,316
62 Mineral County 853
63 Hinsdale County 781
64 San Juan County 646

United States Census Bureau. B01001 SEX BY AGE, 2020 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 17 March 2022. http://www.census.gov/.

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