Post office locations in 20603
| Post Office | Address | Phone | Hours |
| SAINT CHARLES CENTER | 11110 MALL CIR WALDORF, MD 20603 - 4803 | 301-932-4349 | Mon-Fri 11:00 AM - 02:00 PM 02:45 PM - 05:00 PM Sat 11:00 AM - 03:00 PM Sun Closed |
| Post Office | Address | Phone | Hours |
| SAINT CHARLES CENTER | 11110 MALL CIR WALDORF, MD 20603 - 4803 | 301-932-4349 | Mon-Fri 11:00 AM - 02:00 PM 02:45 PM - 05:00 PM Sat 11:00 AM - 03:00 PM Sun Closed |