Passport Application Services - Monkton 16944 York Rd Monkton, MD 21111 Phone : (410) 357-8869 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Fax           (410) 357-9551 Post Office - Monkton 16944 York Rd Monkton, MD 21111 Phone : (410) 357-8869 Post Office - Monkton Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (410) 357-9551