Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Denver (city), CO | 715,522 |
| 2 | Aurora (city), CO | 386,261 |
| 3 | Lakewood (city), CO | 155,984 |
| 4 | Thornton (city), CO | 141,867 |
| 5 | Westminster (city), CO | 116,317 |
| 6 | Centennial (city), CO | 108,418 |
| 7 | Commerce City (city), CO | 62,418 |
| 8 | Parker (town), CO | 58,512 |
| 9 | Northglenn (city), CO | 38,131 |
| 10 | Englewood (city), CO | 33,659 |
| 11 | Wheat Ridge (city), CO | 32,398 |
| 12 | Four Square Mile (CDP), CO | 22,872 |
| 13 | Golden (city), CO | 20,399 |
| 14 | Sherrelwood (CDP), CO | 19,228 |
| 15 | Greenwood Village (city), CO | 15,691 |
| 16 | Welby (CDP), CO | 15,553 |
| 17 | Federal Heights (city), CO | 14,382 |
| 18 | Lone Tree (city), CO | 14,253 |
| 19 | Berkley (CDP), CO | 12,536 |
| 20 | Cherry Creek (CDP), CO | 11,488 |
Identifiers: city · CDP · town
| Rank | Community | Population |
|---|---|---|
| 1 | Denver (city), CO | 715,522 |
| 2 | Aurora (city), CO | 386,261 |
| 3 | Lakewood (city), CO | 155,984 |
| 4 | Thornton (city), CO | 141,867 |
| 5 | Westminster (city), CO | 116,317 |
| 6 | Centennial (city), CO | 108,418 |
| 7 | Highlands Ranch (CDP), CO | 103,444 |
| 8 | Castle Rock (town), CO | 73,158 |
| 9 | Commerce City (city), CO | 62,418 |
| 10 | Parker (town), CO | 58,512 |
| 11 | Littleton (city), CO | 45,652 |
| 12 | Brighton (city), CO | 40,083 |
| 13 | Northglenn (city), CO | 38,131 |
| 14 | Dakota Ridge (CDP), CO | 33,892 |
| 15 | Ken Caryl (CDP), CO | 33,811 |
| 16 | Englewood (city), CO | 33,659 |
| 17 | Wheat Ridge (city), CO | 32,398 |
| 18 | Columbine (CDP), CO | 25,229 |
| 19 | Four Square Mile (CDP), CO | 22,872 |
| 20 | Sherrelwood (CDP), CO | 19,228 |