| Rank | City | 2005 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Denver | 558,506 | 0.1% |
| 2 | Colorado Springs | 388,097 | 1.7% |
| 3 | Aurora | 289,721 | 1.1% |
| 4 | Lakewood | 140,627 | -0.7% |
| 5 | Fort Collins | 128,333 | 1.7% |
| 6 | Westminster | 103,804 | 0.6% |
| 7 | Pueblo | 102,455 | 0.1% |
| 8 | Arvada | 101,894 | -0.1% |
| 9 | Thornton | 100,653 | 4.9% |
| 10 | Centennial | 97,877 | -1.1% |
| 11 | Boulder | 96,412 | 0.5% |
| 12 | Greeley | 85,432 | 2.2% |
| 13 | Longmont | 81,222 | 3.0% |
| 14 | Loveland | 58,707 | 3.1% |
| 15 | Grand Junction | 49,776 | 2.2% |
| 16 | Broomfield | 46,591 | 4.2% |
| 17 | Littleton | 40,407 | -0.0% |
| 18 | Parker | 36,479 | 10.2% |
| 19 | Northglenn | 33,474 | 0.8% |
| 20 | Englewood | 32,460 | 0.4% |
| 21 | Castle Rock | 32,313 | 11.5% |
| 22 | Wheat Ridge | 31,216 | -1.3% |
| 23 | Commerce City | 29,210 | 8.4% |
| 24 | Brighton | 26,734 | 5.8% |
| 25 | Lafayette | 23,880 | 0.5% |
| 26 | Fountain | 18,807 | 4.9% |
| 27 | Louisville | 18,573 | -0.6% |
| 28 | Golden | 17,439 | 0.3% |
| 29 | Evans | 16,241 | 11.5% |
| 30 | Ca�City | 15,569 | -0.0% |
| 31 | Durango | 15,366 | 1.4% |
| 32 | Montrose | 14,734 | 3.1% |
| 33 | Windsor | 13,539 | 6.9% |
| 34 | Sterling | 13,000 | 0.4% |
| 35 | Greenwood Village | 12,981 | 2.7% |
| 36 | Federal Heights | 11,802 | -0.6% |
| 37 | Fort Morgan | 10,764 | -0.6% |
| 38 | Steamboat Springs | 10,762 | 1.6% |
| 39 | Superior | 10,439 | 3.1% |
| 40 | Erie | 10,263 | 11.9% |
| 41 | Craig | 9,123 | -0.1% |
| 42 | Trinidad | 8,901 | -0.6% |
| 43 | Fruita | 8,668 | 6.5% |
| 44 | Alamosa | 8,655 | 0.6% |
| 45 | Lamar | 8,373 | -1.4% |
| 46 | Glenwood Springs | 8,372 | 1.6% |
| 47 | Delta | 8,183 | 1.1% |
| 48 | Cortez | 8,158 | 0.5% |
| 49 | Lone Tree | 7,780 | 2.9% |
| 50 | Rifle | 7,608 | 2.4% |
| 51 | Fort Lupton | 7,427 | 0.7% |
| 52 | La Junta | 7,229 | -1.1% |
| 53 | Woodland Park | 6,659 | -0.5% |
| 54 | Johnstown | 6,497 | 9.8% |
| 55 | Avon | 6,391 | 3.0% |
| 56 | Cherry Hills Village | 6,071 | 0.3% |
| 57 | Frederick | 6,035 | 21.1% |
| 58 | Estes Park | 5,862 | 1.3% |
| 59 | Aspen | 5,824 | -0.6% |
| 60 | Firestone | 5,816 | 26.5% |
| 61 | Carbondale | 5,637 | 1.6% |
| 62 | Salida | 5,496 | -0.4% |
| 63 | Sheridan | 5,434 | -0.5% |
| 64 | Gunnison | 5,325 | -0.4% |
| 65 | Edgewater | 5,241 | -1.0% |
| 66 | Milliken | 5,187 | 14.2% |
| 67 | Berthoud | 5,147 | 0.6% |
| 68 | Brush | 5,118 | -0.1% |
| 69 | Manitou Springs | 5,076 | 0.4% |
| 70 | Gypsum | 4,848 | 5.6% |
| 71 | Glendale | 4,759 | 1.2% |
| 72 | Vail | 4,570 | -0.3% |
| 73 | Monte Vista | 4,312 | -1.5% |
| 74 | Rocky Ford | 4,103 | -1.0% |
| 75 | Burlington | 3,950 | 1.9% |
| 76 | Walsenburg | 3,849 | -1.9% |
| 77 | Eaton | 3,829 | 8.2% |
| 78 | Wellington | 3,787 | 8.7% |
| 79 | Eagle | 3,753 | 5.2% |
| 80 | Castle Pines North | 3,723 | 0.7% |
| 81 | Monument | 3,682 | 14.4% |
| 82 | Silverthorne | 3,642 | 3.0% |
| 83 | Florence | 3,583 | -0.5% |
| 84 | Dacono | 3,419 | 2.6% |
| 85 | Lochbuie | 3,406 | 12.0% |
| 86 | Yuma | 3,267 | -0.1% |
| 87 | Breckenridge | 3,128 | 2.3% |
| 88 | Basalt | 3,032 | 2.5% |
| 89 | Orchard City | 3,017 | 1.1% |
| 90 | New Castle | 2,778 | 7.8% |
| 91 | Leadville | 2,694 | -1.1% |
| 92 | Palisade | 2,681 | 0.9% |
| 93 | Platteville | 2,569 | 1.9% |
| 94 | Las Animas | 2,512 | -2.1% |
| 95 | Center | 2,474 | 0.8% |
| 96 | Bennett | 2,473 | 4.6% |
| 97 | Frisco | 2,466 | 0.3% |
| 98 | Telluride | 2,328 | 0.8% |
| 99 | Mead | 2,280 | 3.3% |
| 100 | Palmer Lake | 2,273 | 0.9% |
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