1. US Post Office 3595 Washington Blvd, Halethorpe, MD 21227 Coordinate: 39.250774,-76.66941 Phone: (800) 275-8777
2. United States Postal Service 6 Waelchli Ave, Halethorpe, MD 21227 Coordinate: 39.2478,-76.68844 Phone: (800) 275-8777