Address: 28 W Salisbury St Williamsport, MD 21795-9998 Local Phone: 301.223.7007 USPS Phone: (800) ASK-USPS TTY Service: (877) 889-2457 for hearing impaired Fax: 410.347.4289 Hours Monday-Friday: 8:30 a.m. – 5:00 p.m. Saturday: 9:00 a.m. – 12:00 p.m. Sunday: Closed Last Daily Collection Monday-Friday: 4:45 p.m. Saturday: 1:45 p.m. Sunday: Closed Lobby Hours Monday-Sunday: 12:01 a.m. – 11:59 p.m. Passport Acceptance Hours** Monday-Friday 9:00 a.m. – 3:00 p.m. Saturday: 9:00 a.m. – 11:00 a.m. Sunday: Closed Passport Photo Hours Monday-Friday: 9:00 a.m. – 3:00 p.m. Saturday: 9:00 a.m. – 11:00 a.m. Sunday: Closed PO Box Access Hours Monday-Sunday: 12:01 a.m. – 11:59 p.m. ** An appointment to apply for a passport is required for this Post Office™ location.