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