| Post Office | Middletown |
| Division | Middlesex |
| Pincode | 6457 |
| Post Office | Cromwell |
| Division | Middlesex |
| Pincode | 6416 |
| Post Office | Clinton |
| Division | Middlesex |
| Pincode | 6413 |
| Post Office | East Hampton |
| Division | Middlesex |
| Pincode | 6424 |
| Post Office | Old Saybrook |
| Division | Middlesex |
| Pincode | 6475 |
| Post Office | Portland |
| Division | Middlesex |
| Pincode | 6480 |
| Post Office | Durham |
| Division | Middlesex |
| Pincode | 6422 |
| Post Office | Westbrook |
| Division | Middlesex |
| Pincode | 6498 |
| Post Office | Killingworth |
| Division | Middlesex |
| Pincode | 6419 |
22 City in Middlesex | List of Zip Codes Location In Connecticut and Your selected County Middlesex