Population in Colorado by County

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

Colorado

5,862,189

Counties

64

Highest

El Paso

742,999

Lowest

San Juan

724

All Colorado counties, ranked

# Counties Population
1 El Paso 742,999
2 Denver 718,877
3 Arapahoe 659,844
4 Jefferson 579,377
5 Adams 530,225
6 Douglas 377,150
7 Larimer 367,368
8 Weld 350,396
9 Boulder 328,961
10 Pueblo 169,356
11 Mesa 158,601
12 Broomfield 76,304
13 Garfield 62,479
14 La Plata 56,331
15 Eagle 55,135
16 Fremont 49,634
17 Montrose 43,807
18 Delta 31,598
19 Summit 31,017
20 Morgan 29,520
21 Elbert 27,874
22 Montezuma 26,412
23 Routt 25,084
24 Teller 24,825
25 Logan 20,892
26 Chaffee 20,178
27 Otero 18,321
28 Park 17,907
29 Gunnison 17,241
30 Pitkin 16,985
31 Alamosa 16,581
32 Grand 15,895
33 Las Animas 14,413
34 Archuleta 13,900
35 Moffat 13,207
36 Prowers 11,910
37 Rio Grande 11,321
38 Yuma 9,979
39 Clear Creek 9,262
40 San Miguel 7,968
41 Conejos 7,530
42 Lake 7,380
43 Kit Carson 7,023
44 Huerfano 6,972
45 Saguache 6,580
46 Rio Blanco 6,544
47 Gilpin 5,901
48 Crowley 5,647
49 Lincoln 5,550
50 Bent 5,549
51 Custer 5,247
52 Ouray 5,087
53 Washington 4,831
54 Phillips 4,496
55 Costilla 3,607
56 Baca 3,428
57 Dolores 2,432
58 Sedgwick 2,304
59 Cheyenne 1,741
60 Kiowa 1,376
61 Jackson 1,372
62 Hinsdale 1,005
63 Mineral 729
64 San Juan 724

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source
U.S. Census Bureau
Citation
U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage
ACS 5-year 2020-2024
License
Public domain (U.S. Census Bureau)
Unit
people
Available at
State · County · ZIP code
Territory roll-up
Summed across each territory
Last loaded
November 2026

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US Population nationwide