U S Government--mt Vernon Bee Branch, AR 72013 Phone : (501) 849-2813 Business Category Government Offices & Public Schools U S Government--post Offices, Mount Vernon Enola, AR 72047 Phone : (501) 849-2813 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Mount Vernon 1375 Highway 36 Mount Vernon, AR 72111 Phone : (501) 849-2813 Business Category Post Offices Toll-Free           (800) ASK-USPS