| Rank | City | 1990 Population | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Denver | 467,549 | -0.5% |
| 2 | Colorado Springs | 283,112 | 2.8% |
| 3 | Aurora | 221,855 | 3.4% |
| 4 | Lakewood | 126,156 | – |
| 5 | Pueblo | 99,009 | – |
| 6 | Arvada | 89,786 | – |
| 7 | Fort Collins | 88,899 | – |
| 8 | Boulder | 86,098 | – |
| 9 | Westminster | 74,176 | – |
| 10 | Greeley | 60,489 | – |
| 11 | Thornton | 55,146 | – |
| 12 | Longmont | 52,214 | – |
| 13 | Loveland | 37,511 | – |
| 14 | Grand Junction | 34,447 | – |
| 15 | Littleton | 33,789 | – |
| 16 | Englewood | 29,905 | – |
| 17 | Wheat Ridge | 29,420 | – |
| 18 | Northglenn | 27,287 | – |
| 19 | Broomfield | 24,966 | – |
| 20 | Commerce City | 16,771 | – |
| 21 | Lafayette | 14,866 | – |
| 22 | Brighton | 14,292 | – |
| 23 | Golden | 12,914 | – |
| 24 | Canon City | 12,774 | – |
| 25 | Durango | 12,698 | – |
| 26 | Louisville | 12,543 | – |
| 27 | Fountain | 11,051 | – |
| 28 | Sterling | 10,232 | – |
| 29 | Montrose | 9,394 | – |
| 30 | Federal Heights | 9,341 | – |
| 31 | Fort Morgan | 9,174 | – |
| 32 | Trinidad | 8,650 | – |
| 33 | Lamar | 8,392 | – |
| 34 | Castle Rock | 8,244 | – |
| 35 | Craig | 8,107 | – |
| 36 | La Junta | 7,708 | – |
| 37 | Greenwood Village | 7,655 | – |
| 38 | Alamosa | 7,601 | – |
| 39 | Cortez | 7,360 | – |
| 40 | Steamboat Springs | 6,751 | – |
| 41 | Glenwood Springs | 6,576 | – |
| 42 | Evans | 6,142 | – |
| 43 | Parker | 5,625 | – |
| 44 | Rifle | 5,432 | – |
| 45 | Fort Lupton | 5,380 | – |
| 46 | Cherry Hills Village | 5,279 | – |
| 47 | Windsor | 5,238 | – |
| 48 | Aspen | 5,181 | – |
| 49 | Delta | 5,058 | – |
| 50 | Sheridan | 4,985 | – |
| 51 | Woodland Park | 4,822 | – |
| 52 | Salida | 4,757 | – |
| 53 | Gunnison | 4,621 | – |
| 54 | Edgewater | 4,606 | – |
| 55 | Manitou Springs | 4,540 | – |
| 56 | Monte Vista | 4,357 | – |
| 57 | Fruita | 4,342 | – |
| 58 | Rocky Ford | 4,233 | – |
| 59 | Brush | 4,136 | – |
| 60 | Vail | 3,740 | – |
| 61 | Walsenburg | 3,313 | – |
| 62 | Estes Park | 3,305 | – |
| 63 | Carbondale | 3,090 | – |
| 64 | Berthoud | 3,087 | – |
| 65 | Florence | 3,030 | – |
| 66 | Burlington | 2,860 | – |
| 67 | Leadville | 2,696 | – |
| 68 | Yuma | 2,684 | – |
| 69 | Glendale | 2,522 | – |
| 70 | Las Animas | 2,520 | – |
| 71 | Rangely | 2,372 | – |
| 72 | Dacono | 2,259 | – |
| 73 | Orchard City | 2,140 | – |
| 74 | Meeker | 2,110 | – |
| 75 | Eaton | 2,044 | – |
| 76 | Wray | 2,023 | – |
| 77 | Center | 1,947 | – |
| 78 | Palisade | 1,943 | – |
| 79 | Holyoke | 1,934 | – |
| 80 | Limon | 1,892 | – |
| 81 | La Salle | 1,874 | – |
| 82 | Idaho Springs | 1,872 | – |
| 83 | Silverthorne | 1,842 | – |
| 84 | Avon | 1,783 | – |
| 85 | Buena Vista | 1,779 | – |
| 86 | Bennett | 1,769 | – |
| 87 | Del Norte | 1,767 | – |
| 88 | Gypsum | 1,756 | – |
| 89 | Eagle | 1,646 | – |
| 90 | Milliken | 1,636 | – |
| 91 | Akron | 1,621 | – |
| 92 | Frisco | 1,619 | – |
| 93 | Johnstown | 1,582 | – |
| 94 | Firestone | 1,530 | – |
| 95 | Springfield | 1,507 | – |
| 96 | Palmer Lake | 1,477 | – |
| 97 | Hayden | 1,445 | – |
| 98 | Snowmass Village | 1,443 | – |
| 99 | Platteville | 1,413 | – |
| 100 | Cedaredge | 1,413 | – |
In 1990, the largest city in Colorado was Denver, with a population of 467,549. The second largest city is Colorado Springs, with a population of 283,112.
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