| Locality | Postal Code |
|---|---|
| Postal/ZIP Codes in Seymour, New Haven | 06483 |
| Postal/ZIP Codes in South Britain, New Haven | 06487 |
| Postal/ZIP Codes in Southbury, New Haven | 06488 |
| Postal/ZIP Codes in Union City, New Haven | 06770 |
| Postal/ZIP Codes in Wallingford, New Haven | 06492, 06493, 06494, 06495 |
| Postal/ZIP Codes in Waterbury, New Haven | 06701, 06702, 06704, 06705, 06706, … |
| Postal/ZIP Codes in West Haven, New Haven | 06516 |
| Postal/ZIP Codes in Westville, New Haven | 06515 |
| Postal/ZIP Codes in Whitneyville, New Haven | 06517 |
| Postal/ZIP Codes in Wolcott, New Haven | 06705, 06716 |
| Postal/ZIP Codes in Woodbridge, New Haven | 06525 |
| Postal/ZIP Codes in Yalesville, New Haven | 06492 |