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 11:00am - 2:00pm 2:45pm - 5:00pm Sat 11:00am - 3:00pm Sun Closed |
| Post Office | Address | Phone | Hours |
| SAINT CHARLES CENTER | 11110 MALL CIR WALDORF, MD 20603 - 4803 | 301-932-4349 | Mon-Fri 11:00am - 2:00pm 2:45pm - 5:00pm Sat 11:00am - 3:00pm Sun Closed |