Zip Code | City | Population |
|---|---|---|
| 80525 | Fort Collins | 55,315 |
| 80538 | Loveland | 48,929 |
| 80526 | Fort Collins | 44,478 |
| 80537 | Loveland | 43,620 |
| 80524 | Fort Collins | 38,711 |
| 80521 | Fort Collins | 38,200 |
| 80528 | Fort Collins | 24,032 |
| 80513 | Berthoud | 16,184 |
| 80549 | Wellington | 13,862 |
| 80517 | Estes Park | 10,407 |
| 80547 | Timnath | 7,122 |
| 80535 | Laporte | 2,462 |
| 80536 | Livermore | 2,437 |
| 80512 | Bellvue | 1,619 |
| 80545 | Red Feather Lakes | 968 |
| 80515 | Drake | 849 |
| 80532 | Glen Haven | 193 |