Post office locations in 20774
| Post Office | Address | Phone | Hours |
| KETTERING | 68 WATKINS PARK DR UPPER MARLBORO, MD 20774 - 9996 | 301-249-4036 | Mon-Fri 12:00pm - 5:00pm Sat 9:00am - 1:00pm Sun Closed |
| LARGO | 9801 APOLLO DR UPPER MARLBORO, MD 20774 - 9997 | 301-925-1485 | Mon-Fri 9:00am - 5:00pm Sat 9:00am - 12:00pm Sun Closed |