| Rank | City | 2015 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Denver | 663,862 | 2.6% |
| 2 | Colorado Springs | 445,830 | 1.7% |
| 3 | Aurora | 353,108 | 2.1% |
| 4 | Fort Collins | 156,480 | 2.1% |
| 5 | Lakewood | 149,643 | 1.1% |
| 6 | Thornton | 130,307 | 2.3% |
| 7 | Arvada | 113,574 | 1.6% |
| 8 | Westminster | 112,090 | 1.4% |
| 9 | Pueblo | 108,423 | 0.4% |
| 10 | Centennial | 107,201 | 1.7% |
| 11 | Boulder | 105,112 | 1.9% |
| 12 | Greeley | 98,596 | 1.5% |
| 13 | Longmont | 90,237 | 1.1% |
| 14 | Loveland | 72,651 | 2.1% |
| 15 | Broomfield | 62,138 | 2.7% |
| 16 | Grand Junction | 60,210 | 0.7% |
| 17 | Castle Rock | 55,747 | 3.7% |
| 18 | Commerce City | 51,762 | 3.0% |
| 19 | Parker | 49,857 | 2.4% |
| 20 | Littleton | 44,669 | 1.7% |
| 21 | Northglenn | 38,596 | 1.9% |
| 22 | Brighton | 36,765 | 2.5% |
| 23 | Englewood | 32,480 | 1.8% |
| 24 | Wheat Ridge | 31,034 | 0.7% |
| 25 | Fountain | 27,631 | 1.7% |
| 26 | Lafayette | 27,081 | 2.6% |
| 27 | Windsor | 21,106 | 3.1% |
| 28 | Erie | 20,493 | 3.1% |
| 29 | Evans | 20,473 | 2.5% |
| 30 | Golden | 20,201 | 1.7% |
| 31 | Louisville | 20,112 | 2.3% |
| 32 | Montrose | 19,045 | -0.1% |
| 33 | Durango | 17,834 | 1.4% |
| 34 | Cañon City | 16,337 | -0.1% |
| 35 | Greenwood Village | 15,385 | 2.5% |
| 36 | Sterling | 14,629 | -0.3% |
| 37 | Lone Tree | 13,545 | 7.3% |
| 38 | Johnstown | 13,306 | 7.7% |
| 39 | Superior | 12,855 | 0.7% |
| 40 | Fruita | 12,761 | 0.2% |
| 41 | Steamboat Springs | 12,260 | 0.4% |
| 42 | Federal Heights | 12,178 | 1.5% |
| 43 | Firestone | 11,537 | 3.3% |
| 44 | Fort Morgan | 11,329 | 0.0% |
| 45 | Frederick | 10,927 | 5.9% |
| 46 | Castle Pines | 10,796 | 0.9% |
| 47 | Glenwood Springs | 9,840 | 0.6% |
| 48 | Alamosa | 9,531 | 2.1% |
| 49 | Rifle | 9,488 | 0.9% |
| 50 | Craig | 8,846 | -1.7% |
| 51 | Delta | 8,720 | -0.6% |
| 52 | Cortez | 8,602 | 0.4% |
| 53 | Trinidad | 8,193 | -2.6% |
| 54 | Fort Lupton | 7,783 | 1.3% |
| 55 | Lamar | 7,608 | -0.6% |
| 56 | Woodland Park | 7,194 | -0.0% |
| 57 | Wellington | 7,185 | 3.4% |
| 58 | La Junta | 6,964 | -0.4% |
| 59 | Aspen | 6,805 | 0.5% |
| 60 | Gypsum | 6,797 | 1.2% |
| 61 | Carbondale | 6,574 | 0.6% |
| 62 | Eagle | 6,572 | 0.2% |
| 63 | Avon | 6,447 | – |
| 64 | Cherry Hills Village | 6,423 | 1.8% |
| 65 | Monument | 6,391 | 3.7% |
| 66 | Estes Park | 6,165 | 1.3% |
| 67 | Milliken | 6,091 | 2.1% |
| 68 | Gunnison | 5,973 | 0.5% |
| 69 | Sheridan | 5,949 | 1.2% |
| 70 | Berthoud | 5,807 | 3.3% |
| 71 | Brush | 5,466 | 0.0% |
| 72 | Salida | 5,406 | 0.8% |
| 73 | Vail | 5,328 | 0.1% |
| 74 | Manitou Springs | 5,314 | 1.6% |
| 75 | Lochbuie | 5,302 | 2.9% |
| 76 | Edgewater | 5,289 | 0.6% |
| 77 | Glendale | 5,115 | 5.2% |
| 78 | Eaton | 4,815 | 2.5% |
| 79 | Breckenridge | 4,749 | 1.1% |
| 80 | New Castle | 4,608 | 0.5% |
| 81 | Dacono | 4,544 | 2.3% |
| 82 | Monte Vista | 4,311 | -0.8% |
| 83 | Silverthorne | 4,271 | 2.4% |
| 84 | Mead | 4,104 | 4.8% |
| 85 | Burlington | 4,014 | -1.4% |
| 86 | Basalt | 3,919 | 0.4% |
| 87 | Rocky Ford | 3,873 | -0.5% |
| 88 | Florence | 3,852 | -0.2% |
| 89 | Yuma | 3,606 | 0.6% |
| 90 | Severance | 3,525 | 2.7% |
| 91 | Orchard City | 3,025 | -0.8% |
| 92 | Silt | 3,007 | 0.7% |
| 93 | Frisco | 2,914 | 2.1% |
| 94 | Snowmass Village | 2,898 | 0.6% |
| 95 | Walsenburg | 2,896 | -1.4% |
| 96 | Buena Vista | 2,734 | 1.1% |
| 97 | Palisade | 2,645 | -0.4% |
| 98 | Platteville | 2,608 | 1.2% |
| 99 | Leadville | 2,595 | -0.1% |
| 100 | Palmer Lake | 2,579 | 1.6% |
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