Identifiers: city · town
| Rank | Community | Population |
|---|---|---|
| 1 | Fort Collins (city), CO | 169,810 |
| 2 | Greeley (city), CO | 108,795 |
| 3 | Longmont (city), CO | 98,885 |
| 4 | Loveland (city), CO | 76,378 |
| 5 | Windsor (town), CO | 32,716 |
| 6 | Erie (town), CO | 30,038 |
| 7 | Evans (city), CO | 22,165 |
| 8 | Johnstown (town), CO | 17,303 |
| 9 | Firestone (town), CO | 16,381 |
| 10 | Frederick (town), CO | 14,513 |
| 11 | Wellington (town), CO | 11,047 |
| 12 | Berthoud (town), CO | 10,332 |
| 13 | Milliken (town), CO | 8,386 |
| 14 | Severance (town), CO | 7,683 |
| 15 | Timnath (town), CO | 6,487 |
| 16 | Dacono (city), CO | 6,297 |
| 17 | Mead (town), CO | 4,781 |
| 18 | Platteville (town), CO | 2,955 |
| 19 | La Salle (town), CO | 2,359 |
| 20 | Lyons (town), CO | 2,209 |
Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Fort Collins (city), CO | 169,810 |
| 2 | Greeley (city), CO | 108,795 |
| 3 | Longmont (city), CO | 98,885 |
| 4 | Loveland (city), CO | 76,378 |
| 5 | Windsor (town), CO | 32,716 |
| 6 | Johnstown (town), CO | 17,303 |
| 7 | Wellington (town), CO | 11,047 |
| 8 | Berthoud (town), CO | 10,332 |
| 9 | Severance (town), CO | 7,683 |
| 10 | Timnath (town), CO | 6,487 |
| 11 | Mead (town), CO | 4,781 |
| 12 | Laporte (CDP), CO | 2,409 |
Identifiers: city · town
| Rank | Community | Population |
|---|---|---|
| 1 | Fort Collins (city), CO | 169,810 |
| 2 | Greeley (city), CO | 108,795 |
| 3 | Longmont (city), CO | 98,885 |
| 4 | Loveland (city), CO | 76,378 |
| 5 | Windsor (town), CO | 32,716 |
| 6 | Johnstown (town), CO | 17,303 |
| 7 | Firestone (town), CO | 16,381 |
| 8 | Frederick (town), CO | 14,513 |
| 9 | Wellington (town), CO | 11,047 |
| 10 | Berthoud (town), CO | 10,332 |
| 11 | Milliken (town), CO | 8,386 |
| 12 | Severance (town), CO | 7,683 |
| 13 | Timnath (town), CO | 6,487 |
| 14 | Dacono (city), CO | 6,297 |
| 15 | Mead (town), CO | 4,781 |
| 16 | La Salle (town), CO | 2,359 |
| 17 | Lyons (town), CO | 2,209 |
| 18 | Garden City (town), CO | 254 |
Identifiers: city · town · CDP
| Rank | Community | Population |
|---|---|---|
| 1 | Fort Collins (city), CO | 169,810 |
| 2 | Greeley (city), CO | 108,795 |
| 3 | Longmont (city), CO | 98,885 |
| 4 | Loveland (city), CO | 76,378 |
| 5 | Windsor (town), CO | 32,716 |
| 6 | Johnstown (town), CO | 17,303 |
| 7 | Wellington (town), CO | 11,047 |
| 8 | Berthoud (town), CO | 10,332 |
| 9 | Severance (town), CO | 7,683 |
| 10 | Timnath (town), CO | 6,487 |
| 11 | Mead (town), CO | 4,781 |
| 12 | Laporte (CDP), CO | 2,409 |