Mount vernon jail mugshots Posey County Jail in Mount Vernon, Indiana, is a medium-security correctional institution that serves Posey County and its surrounding areas. For inmate information, you can call the facility 24/7 at 903-537-4539. Mount Vernon, Ohio Information. We understand that there are victims out there, and that they have a right to air their grievances. This jail processes individuals arrested for misdemeanors and felonies. The inmates at this facility are allowed visitation. Posey County Jail Inmate Search and Jail Roster - Offender Mugshots. Posey County is part of the Evansville, Indiana metropolitan statistical area. According to the United States Census Bureau, the city has a total area of 3. km). rajkwoydwfloneqetlekvssvytxnbmxwuhxvadclcbqxtoibcrakyudhwgkrwrkizrtrnffreic