Rank City Population (2012)
1 Denver, Colorado 634,265
2 Colorado Springs, Colorado 431,834
3 Aurora, Colorado 339,030
4 Fort Collins, Colorado 148,612
5 Lakewood, Colorado 145,516
6 Thornton, Colorado 124,140
7 Arvada, Colorado 109,745
8 Westminster, Colorado 109,169
9 Pueblo, Colorado 107,772
10 Centennial, Colorado 103,743
11 Boulder, Colorado 101,808
12 Greeley, Colorado 95,357
13 Longmont, Colorado 88,669
14 Loveland, Colorado 70,223
15 Grand Junction, Colorado 59,899
16 Broomfield, Colorado 58,298
17 Castle Rock, Colorado 51,348
18 Commerce City, Colorado 48,421
19 Parker, Colorado 47,169
20 Littleton, Colorado 43,775
21 Northglenn, Colorado 36,891
22 Brighton, Colorado 34,636
23 Englewood, Colorado 31,177
24 Wheat Ridge, Colorado 30,717
25 Fountain, Colorado 26,891
26 Lafayette, Colorado 25,733
27 Windsor, Colorado 19,751
28 Evans, Colorado 19,576
29 Erie, Colorado 19,272
30 Golden, Colorado 19,186
31 Louisville, Colorado 19,074
32 Montrose, Colorado 18,981
33 Durango, Colorado 17,216
34 CaƱon City, Colorado 16,462
35 Sterling, Colorado 14,727
36 Greenwood Village, Colorado 14,454
37 Superior, Colorado 12,782
38 Fruita, Colorado 12,696
39 Steamboat Springs, Colorado 12,029
40 Lone Tree, Colorado 11,852
41 Federal Heights, Colorado 11,794
42 Fort Morgan, Colorado 11,451
43 Johnstown, Colorado 11,051
44 Firestone, Colorado 10,903
45 Castle Pines, Colorado 10,651
46 Glenwood Springs, Colorado 9,677
47 Alamosa, Colorado 9,433
48 Frederick, Colorado 9,400
49 Rifle, Colorado 9,267
50 Craig, Colorado 9,046
51 Delta, Colorado 8,818
52 Trinidad, Colorado 8,771
53 Cortez, Colorado 8,474
54 Lamar, Colorado 7,836
55 Fort Lupton, Colorado 7,592
56 Woodland Park, Colorado 7,189
57 La Junta, Colorado 7,046
58 Aspen, Colorado 6,680
59 Gypsum, Colorado 6,515
60 Wellington, Colorado 6,514
61 Carbondale, Colorado 6,489
62 Eagle, Colorado 6,474
63 Avon, Colorado 6,345
64 Cherry Hills Village, Colorado 6,226
65 Estes Park, Colorado 6,017
66 Gunnison, Colorado 5,892
67 Sheridan, Colorado 5,830
68 Milliken, Colorado 5,787
69 Monument, Colorado 5,742
70 Brush, Colorado 5,513
71 Salida, Colorado 5,317
72 Berthoud, Colorado 5,267
73 Vail, Colorado 5,253
74 Edgewater, Colorado 5,222
75 Lochbuie, Colorado 5,197
76 Manitou Springs, Colorado 5,172

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