Post Offices List in Upper Marlboro City, Maryland:
| Upper Marlboro Post Office | 14605 Elm St, Upper Marlboro, MD 20772 |
| Largo Post Office | 9801 Apollo Dr, Upper Marlboro, MD 20774 |
| Kettering Post Office | 68 Watkins Park Dr, Upper Marlboro, MD 20774 |
| Upper Marlboro Post Office | 14605 Elm St, Upper Marlboro, MD 20772 |
| Largo Post Office | 9801 Apollo Dr, Upper Marlboro, MD 20774 |
| Kettering Post Office | 68 Watkins Park Dr, Upper Marlboro, MD 20774 |