The Potomac Post Office is a part of the United States Postal Service, and offers mail delivery and collection to the area. The last daily collection of the mail is at 5 pm Monday - Saturday.
- Hours: Full service: Mon - Fri, 9am - 5pm; Sat, 9am - 1pm, Sun, holidays, closed. Lobby: Daily, 24 hrs.
- Handicap Accessible: Ramps and railings.
- Services: The Potomac Post Office offers passport applications and processing. The passport processing services are open Monday through Friday, 11 a.m. until 4 p.m. The post office also has automated postal centers that are open 24 hours a day, seven days a week.
- Parking: Free lot
- Public restrooms: Yes
- Wi-Fi: None
- Stamp machine: Yes
- P. O. boxes: Yes
- Packaging sold: Yes