Post office locations in 20855
| Post Office | Address | Phone | Hours |
| DERWOOD | 17533 REDLAND RD DERWOOD, MD 20855 - 9998 | 301-527-1103 | Mon-Fri 9:00am - 5:00pm Sat 9:00am - 1:00pm Sun Closed |
| Post Office | Address | Phone | Hours |
| DERWOOD | 17533 REDLAND RD DERWOOD, MD 20855 - 9998 | 301-527-1103 | Mon-Fri 9:00am - 5:00pm Sat 9:00am - 1:00pm Sun Closed |