| Locality | Post Code |
|---|---|
| Springfield, Hampden | 01103, 01104, 01105, 01106, 01107, … |
| Thorndike, Hampden | 01079 |
| Three Rivers, Hampden | 01080 |
| Tolland, Hampden | 01034 |
| Wales, Hampden | 01081 |
| West Granville, Hampden | 01034 |
| West Springfield, Hampden | 01089 |
| Westfield, Hampden | 01085 |
| Wilbraham, Hampden | 01095 |
| Willimansett, Hampden | 01013 |
| Woronoco, Hampden | 01097 |