Tags: Prison.
Mark W. Stiles Unit is a Texas Department of Criminal Justice men’s prison located in an unincorporated area of Jefferson County Texas near Beaumont. The unit located along Farm to Market Road 3514 is 4 miles (6.4 km) southeast of downtown Beaumont. The approximately 776 acres (314 ha) unit is co-located with the Gist Unit and the LeBlanc Unit.The unit opened in June 1993. The unit serves as the University of Texas Medical Branch hub site for treatment of HIV and other infectious diseases.