35 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 80634 | Greeley | 63,553 |
| 80504 | Longmont | 61,305 |
| 80631 | Greeley | 53,920 |
| 80550 | Windsor | 44,224 |
| 80516 | Erie | 37,107 |
| 80620 | Evans | 20,776 |
| 80534 | Johnstown | 19,696 |
| 80621 | Fort Lupton | 14,542 |
| 80543 | Milliken | 9,342 |
| 80615 | Eaton | 9,242 |
| 80514 | Dacono | 6,419 |
| 80530 | Frederick | 6,097 |
| 80542 | Mead | 5,552 |
| 80645 | La Salle | 4,970 |
| 80651 | Platteville | 4,552 |
| 80642 | Hudson | 4,449 |
| 80643 | Keenesburg | 4,257 |
| 80610 | Ault | 4,175 |
| 80644 | Kersey | 2,266 |
| 80650 | Pierce | 1,992 |
| 80520 | Firestone | 1,684 |
| 80648 | Nunn | 1,423 |
| 80623 | Gilcrest | 987 |
| 80624 | Gill | 707 |
| 80611 | Briggsdale | 586 |
| 80652 | Roggen | 492 |
| 80612 | Carr | 435 |
| 80729 | Grover | 384 |
| 80649 | Orchard | 294 |
| 80622 | Galeton | 256 |
| 80742 | New Raymer | 215 |
| 80546 | Severance | 171 |
| 80754 | Stoneham | 156 |
| 80732 | Hereford | 34 |
| 80646 | Lucerne | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 35 ZCTAs in Weld County, Colorado (US Census).