| Locality | Post Code |
|---|---|
| Ault, Weld | 80610 |
| Briggsdale, Weld | 80611 |
| Brighton, Weld | 80603 |
| Carr, Weld | 80612 |
| Dacono, Weld | 80514 |
| Eaton, Weld | 80615 |
| Erie, Weld | 80514, 80516 |
| Evans, Weld | 80620, 80634 |
| Firestone, Weld | 80504, 80520 |
| Fort Lupton, Weld | 80621 |
| Frederick, Weld | 80504, 80530 |
| Galeton, Weld | 80622 |
| Garden City, Weld | 80631 |
| Gilcrest, Weld | 80623 |
| Gill, Weld | 80624 |
| Greeley, Weld | 80631, 80634, 80639 |
| Grover, Weld | 80729 |
| Hereford, Weld | 80732 |
| Hudson, Weld | 80642 |
| Johnstown, Weld | 80534 |
| Keenesburg, Weld | 80643 |
| Kersey, Weld | 80644 |
| La Salle, Weld | 80645 |
| Lochbuie, Weld | 80603 |
| Longmont, Weld | 80504 |
| Loveland, Weld | 80534 |