Post office locations in 06437
| Post Office | Address | Phone | Hours |
| GUILFORD | 42 WATER ST GUILFORD, CT 06437 - 9994 | 203-453-2429 | Mon-Fri 08:30 AM - 05:30 PM Sat 08:30 AM - 01:00 PM Sun Closed |
| GUILFORD/MADISON CAR ANNEX | 60 SHORELINE DR GUILFORD, CT 06437 - 9998 | 203-458-4052 |