Post Office - Cpu Downtown 68 S Main St Grenada, MS 38901 Phone : (662) 227-1768 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (601) 351-7510 U S Government--post Office, Downtown Contract Branch 68 S Main St Grenada, MS 38901 Phone : (662) 227-1768 Business Category Post Offices Government Offices & Public Schools