| Localité | Code postal |
|---|---|
| Allenspark, Boulder | 80510 |
| Boulder, Boulder | 80301, 80302, 80303, 80304, 80305, … |
| Eldorado Springs, Boulder | 80025 |
| Frederick, Boulder | 80516 |
| Hygiene, Boulder | 80533 |
| Jamestown, Boulder | 80455 |
| Lafayette, Boulder | 80026 |
| Longmont, Boulder | 80501, 80503 |
| Louisville, Boulder | 80027 |
| Lyons, Boulder | 80540 |
| Nederland, Boulder | 80466 |
| Niwot, Boulder | 80503 |
| Pinecliffe, Boulder | 80471 |
| Superior, Boulder | 80027 |
| Ward, Boulder | 80481 |