Colorado Counties by Population

Below are the 64 Colorado counties sorted by population from largest to smallest. The population data are from the 2021 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!

Rank County Population
1 El Paso County 722,736
2 Denver County 706,799
3 Arapahoe County 651,621
4 Jefferson County 580,130
5 Adams County 514,969
6 Larimer County 354,670
7 Douglas County 351,929
8 Boulder County 328,713
9 Weld County 322,424
10 Pueblo County 167,453
11 Mesa County 154,685
12 Broomfield County 72,697
13 Garfield County 61,221
14 Eagle County 55,693
15 La Plata County 55,673
16 Fremont County 49,007
17 Montrose County 42,328
18 Delta County 31,133
19 Summit County 31,042
20 Morgan County 28,868
21 Montezuma County 25,916
22 Elbert County 25,897
23 Routt County 24,899
24 Teller County 24,607
25 Logan County 21,765
26 Chaffee County 19,436
27 Otero County 18,665
28 Pitkin County 17,471
29 Park County 17,384
30 Gunnison County 16,851
31 Alamosa County 16,377
32 Grand County 15,629
33 Las Animas County 14,531
34 Archuleta County 13,267
35 Moffat County 13,240
36 Prowers County 11,966
37 Rio Grande County 11,476
38 Yuma County 9,944
39 Clear Creek County 9,427
40 San Miguel County 8,084
41 Conejos County 7,579
42 Lake County 7,417
43 Kit Carson County 7,071
44 Huerfano County 6,787
45 Rio Blanco County 6,495
46 Saguache County 6,369
47 Crowley County 6,018
48 Bent County 5,861
49 Gilpin County 5,812
50 Lincoln County 5,630
51 Ouray County 4,850
52 Washington County 4,834
53 Custer County 4,720
54 Phillips County 4,497
55 Baca County 3,519
56 Costilla County 3,517
57 Sedgwick County 2,459
58 Dolores County 2,288
59 Cheyenne County 1,691
60 Kiowa County 1,414
61 Jackson County 1,375
62 Hinsdale County 858
63 Mineral County 794
64 San Juan County 698

United States Census Bureau. B01001 SEX BY AGE, 2021 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 8 December 2022. http://www.census.gov/.

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