State Government in Picayune, MS United States Postal Service120 Highway 11 NPicayune, MS, 394666017987401Government Offices Post OfficeUnited States Post OfficeUsps United States Postal Service6342 Highway 11 NPicayune, MS, 394666017982876Government Offices Post OfficeUnited States Post OfficeUsps Show MoreSee AlsoJustice Courts