U S Government--post Office, Harrisville Mendenhall, MS 39114 Phone : (601) 847-4342 Business Category Post Offices Government Offices & Public Schools U S Government--post Office Harrisville, MS 39082 Phone : (601) 847-4342 Business Category Post Offices Government Offices & Public Schools Post Office - Harrisville 1569 Simpson Highway 469 Harrisville, MS 39082 Phone : (601) 847-4342 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (601) 351-7510