Posted on February 18, 2019 by WebsiteYellowPages.com US Post Office 1 2 3 4 50.000 LocationsMaryland Bookmark Contact Information Business Name US Post Office Address 137 W Main St, Maryland 21921-5506 Phone Number 2098473270 Fax Number 4103984040 Website http://www.usps.com Post navigationPrevious post: Warren-Ehret CoNext post: Subway Sandwiches & Salads