| Rank | City | 2003 Population (Est.) | Growth Rate (Annual) |
|---|---|---|---|
| 1 | Denver | 561,072 | 0.4% |
| 2 | Colorado Springs | 376,341 | 1.9% |
| 3 | Aurora | 282,707 | 0.9% |
| 4 | Lakewood | 143,227 | -0.4% |
| 5 | Fort Collins | 125,512 | 2.2% |
| 6 | Westminster | 103,667 | 1.1% |
| 7 | Pueblo | 103,317 | 0.6% |
| 8 | Arvada | 101,893 | -0.2% |
| 9 | Centennial | 99,301 | -1.5% |
| 10 | Boulder | 95,759 | 0.6% |
| 11 | Thornton | 93,436 | 5.9% |
| 12 | Greeley | 82,812 | 2.8% |
| 13 | Longmont | 78,712 | 4.4% |
| 14 | Loveland | 56,009 | 3.9% |
| 15 | Grand Junction | 47,223 | 1.7% |
| 16 | Broomfield | 42,522 | 3.7% |
| 17 | Littleton | 40,366 | -0.1% |
| 18 | Northglenn | 34,360 | 2.9% |
| 19 | Englewood | 33,007 | 1.6% |
| 20 | Parker | 32,213 | 14.1% |
| 21 | Wheat Ridge | 32,092 | -1.2% |
| 22 | Castle Rock | 25,769 | 11.0% |
| 23 | Commerce City | 23,928 | 6.4% |
| 24 | Lafayette | 23,769 | 0.9% |
| 25 | Brighton | 23,713 | 5.5% |
| 26 | Louisville | 18,747 | -0.8% |
| 27 | Golden | 17,282 | 0.2% |
| 28 | Fountain | 17,128 | 5.1% |
| 29 | Ca�City | 15,694 | 0.4% |
| 30 | Durango | 14,970 | 1.5% |
| 31 | Montrose | 13,928 | 3.4% |
| 32 | Evans | 13,706 | 14.3% |
| 33 | Sterling | 13,096 | 1.1% |
| 34 | Greenwood Village | 13,040 | 5.7% |
| 35 | Windsor | 12,598 | 10.3% |
| 36 | Federal Heights | 12,128 | 0.2% |
| 37 | Fort Morgan | 10,919 | -0.5% |
| 38 | Steamboat Springs | 10,456 | 1.8% |
| 39 | Superior | 10,156 | 4.8% |
| 40 | Craig | 9,161 | -0.0% |
| 41 | Trinidad | 9,040 | -0.5% |
| 42 | Lamar | 8,654 | -1.1% |
| 43 | Erie | 8,625 | 14.7% |
| 44 | Alamosa | 8,576 | 0.8% |
| 45 | Glenwood Springs | 8,255 | 2.4% |
| 46 | Delta | 8,090 | 1.6% |
| 47 | Cortez | 8,079 | 0.5% |
| 48 | Fort Lupton | 7,517 | 2.0% |
| 49 | Lone Tree | 7,463 | 3.7% |
| 50 | Fruita | 7,450 | 5.2% |
| 51 | La Junta | 7,355 | -1.3% |
| 52 | Rifle | 7,340 | 3.1% |
| 53 | Woodland Park | 6,813 | 0.2% |
| 54 | Cherry Hills Village | 6,065 | 0.6% |
| 55 | Aspen | 5,932 | -0.2% |
| 56 | Avon | 5,777 | 0.9% |
| 57 | Estes Park | 5,717 | 1.4% |
| 58 | Salida | 5,594 | 0.0% |
| 59 | Carbondale | 5,533 | 2.4% |
| 60 | Sheridan | 5,477 | -0.6% |
| 61 | Gunnison | 5,475 | 0.7% |
| 62 | Edgewater | 5,419 | -0.4% |
| 63 | Berthoud | 5,246 | 2.1% |
| 64 | Johnstown | 5,208 | 7.9% |
| 65 | Brush | 5,129 | – |
| 66 | Manitou Springs | 5,069 | 0.8% |
| 67 | Glendale | 4,832 | 3.2% |
| 68 | Frederick | 4,708 | 29.5% |
| 69 | Vail | 4,627 | -0.0% |
| 70 | Gypsum | 4,539 | 8.0% |
| 71 | Monte Vista | 4,395 | -2.1% |
| 72 | Firestone | 4,347 | 38.4% |
| 73 | Rocky Ford | 4,128 | -1.7% |
| 74 | Walsenburg | 4,029 | -1.4% |
| 75 | Milliken | 3,976 | 14.2% |
| 76 | Burlington | 3,888 | 3.0% |
| 77 | Florence | 3,679 | 0.3% |
| 78 | Castle Pines North | 3,581 | -0.6% |
| 79 | Silverthorne | 3,558 | 4.9% |
| 80 | Eaton | 3,525 | 12.3% |
| 81 | Eagle | 3,345 | 4.5% |
| 82 | Wellington | 3,321 | 10.6% |
| 83 | Dacono | 3,309 | 3.5% |
| 84 | Yuma | 3,246 | -0.5% |
| 85 | Breckenridge | 3,085 | 4.0% |
| 86 | Monument | 3,073 | 19.7% |
| 87 | Orchard City | 2,969 | 1.3% |
| 88 | Basalt | 2,946 | 3.5% |
| 89 | Lochbuie | 2,942 | 16.6% |
| 90 | Leadville | 2,745 | -1.3% |
| 91 | Palisade | 2,636 | 1.0% |
| 92 | Las Animas | 2,601 | -2.6% |
| 93 | Platteville | 2,547 | 3.4% |
| 94 | New Castle | 2,493 | 10.1% |
| 95 | Frisco | 2,439 | 0.1% |
| 96 | Center | 2,434 | 0.8% |
| 97 | Telluride | 2,381 | 2.8% |
| 98 | Holyoke | 2,273 | 0.6% |
| 99 | Bennett | 2,259 | 4.5% |
| 100 | Palmer Lake | 2,254 | 1.4% |
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