Post Office - Mize 107 N Oak St Mize, MS 39116 Phone : (601) 733-2292 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (601) 351-7510 U S Government--post Office Mize, MS 39116 Phone : (601) 733-2292 Business Category Post Offices Government Offices & Public Schools