US Census Data

Largest by population in Colorado

Colorado counties and cities ranked by population.

This page ranks the counties and cities of Colorado by population — which have the most people, according to the US Census Bureau's American Community Survey 5-year estimates.

Among counties, El Paso County leads at 736,008.

Among cities & places, Denver leads at 713,734.

Counties

#NamePopulation
1El Paso County736,008
2Denver County713,734
3Arapahoe County655,709
4Jefferson County579,715
5Adams County524,408
6Douglas County368,283
7Larimer County363,561
8Weld County340,711
9Boulder County328,317
10Pueblo County168,726
11Mesa County157,316
12Broomfield County75,110
13Garfield County62,034
14La Plata County56,088
15Eagle County55,374
16Fremont County49,394
17Montrose County43,272
18Delta County31,353
19Summit County30,857
20Morgan County29,186
21Elbert County27,152
22Montezuma County26,204
23Routt County24,990
24Teller County24,774
25Logan County21,067
26Chaffee County19,876
27Otero County18,460
28Park County17,739
29Gunnison County17,158
30Pitkin County17,119
31Alamosa County16,515
32Grand County15,794
33Las Animas County14,392
34Archuleta County13,730
35Moffat County13,258
36Prowers County11,931
37Rio Grande County11,394
38Yuma County9,921
39Clear Creek County9,358
40San Miguel County8,026
41Conejos County7,536
42Lake County7,411
43Kit Carson County7,015
44Huerfano County6,946
45Rio Blanco County6,518
46Saguache County6,511
47Gilpin County5,877
48Crowley County5,734
49Lincoln County5,561
50Bent County5,524
51Custer County5,073
52Ouray County5,024
53Washington County4,839
54Phillips County4,491
55Costilla County3,571
56Baca County3,460
57Dolores County2,385
58Sedgwick County2,346
59Cheyenne County1,732
60Jackson County1,422
61Kiowa County1,356
62Hinsdale County939
63Mineral County799
64San Juan County690

Cities & places

Top 100.
#NamePopulation
1Denver713,734
2Colorado Springs483,099
3Aurora390,201
4Fort Collins169,705
5Lakewood156,309
6Thornton142,878
7Arvada122,835
8Westminster115,546
9Pueblo111,514
10Greeley109,421
11Centennial107,386
12Boulder106,274
13Highlands Ranch101,437
14Longmont98,958
15Loveland77,350
16Castle Rock76,614
17Broomfield75,110
18Grand Junction67,027
19Commerce City64,640
20Parker60,115
21Littleton45,092
22Brighton41,196
23Security-Widefield38,659
24Northglenn37,953
25Windsor35,918
26Pueblo West34,992
27Dakota Ridge34,159
28Englewood33,774
29Ken Caryl33,407
30Wheat Ridge32,158
31Erie31,927
32Lafayette30,471
33Fountain29,327
34Columbine25,681
35Evans22,265
36Four Square Mile21,788
37Louisville20,788
38Montrose20,703
39Golden20,467
40Clifton19,746
41Sherrelwood19,368
42Durango19,257
43Cimarron Hills18,808
44Fort Carson18,447
45Johnstown18,075
46Firestone17,353
47Cañon City17,098
48Welby16,232
49Frederick15,893
50Greenwood Village15,485
51Black Forest14,658
52Federal Heights14,160
53Lone Tree14,136
54Fruita13,578
55Steamboat Springs13,341
56Sterling13,273
57Superior13,136
58Castle Pines12,573
59The Pinery11,740
60Berthoud11,684
61Wellington11,538
62Fort Morgan11,521
63Monument11,035
64Cherry Creek11,011
65Berkley10,838
66Fairmount10,521
67Rifle10,466
68Gunbarrel10,424
69Edwards10,415
70Glenwood Springs10,171
71Alamosa9,847
72Roxborough Park9,365
73Severance9,302
74Delta9,266
75Stonegate9,164
76Craig9,022
77Cortez8,898
78Woodmoor8,819
79Redlands8,771
80Milliken8,695
81Derby8,692
82Evergreen8,643
83Fort Lupton8,494
84Gypsum8,481
85Trinidad8,309
86Twin Lakes8,279
87Lochbuie8,142
88Applewood8,120
89Timnath8,007
90Fruitvale7,998
91Woodland Park7,909
92Lamar7,629
93Eagle7,479
94La Junta7,211
95Aspen6,862
96Gunnison6,712
97Air Force Academy6,701
98Orchard Mesa6,597
99Carbondale6,553
100Dacono6,419

Nationwide

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Other rankings in Colorado

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