Boyd Unit (Teague)
Byrd Unit (Huntsville)
Diboll Unit (Diboll)
Duncan Unit (Diboll)
Ellis Unit (Huntsville area)
Estelle Unit (Huntsville area)
Ferguson Unit (Midway)
Goodman Unit (Jasper)
Goree Unit (Huntsville)
Hamilton Unit (Bryan)
Holliday Unit (Huntsville)
Gib Lewis Unit (Woodville)
Luther Unit (Navasota)
Pack Unit (Navasota)
Polunsky Unit (Livingston)
Wainwright Unit (Lovelady)
Wynne Unit (Huntsville)