Colorado Counties by Population

Below are the 64 Colorado counties sorted by population from largest to smallest. The population data are from the 2022 American Community Survey.

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Rank County Population
1 El Paso County 730,323
2 Denver County 710,800
3 Arapahoe County 654,453
4 Jefferson County 580,519
5 Adams County 520,149
6 Douglas County 360,206
7 Larimer County 359,363
8 Weld County 331,466
9 Boulder County 328,658
10 Pueblo County 168,135
11 Mesa County 156,131
12 Broomfield County 73,946
13 Garfield County 61,683
14 La Plata County 55,983
15 Eagle County 55,650
16 Fremont County 49,107
17 Montrose County 42,823
18 Delta County 31,173
19 Summit County 30,955
20 Morgan County 29,045
21 Elbert County 26,457
22 Montezuma County 26,070
23 Routt County 24,944
24 Teller County 24,758
25 Logan County 21,302
26 Chaffee County 19,564
27 Otero County 18,580
28 Park County 17,597
29 Pitkin County 17,325
30 Gunnison County 17,018
31 Alamosa County 16,460
32 Grand County 15,724
33 Las Animas County 14,422
34 Archuleta County 13,509
35 Moffat County 13,232
36 Prowers County 11,968
37 Rio Grande County 11,442
38 Yuma County 9,938
39 Clear Creek County 9,403
40 San Miguel County 8,082
41 Conejos County 7,553
42 Lake County 7,403
43 Kit Carson County 7,039
44 Huerfano County 6,896
45 Rio Blanco County 6,511
46 Saguache County 6,454
47 Gilpin County 5,856
48 Crowley County 5,782
49 Lincoln County 5,583
50 Bent County 5,561
51 Ouray County 4,936
52 Custer County 4,885
53 Washington County 4,817
54 Phillips County 4,493
55 Costilla County 3,534
56 Baca County 3,496
57 Sedgwick County 2,391
58 Dolores County 2,329
59 Cheyenne County 1,726
60 Jackson County 1,440
61 Kiowa County 1,347
62 Hinsdale County 911
63 Mineral County 794
64 San Juan County 690

United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023. http://www.census.gov/.

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