The John B. Connally Unit is a maximum-security prison for males located in unincorporated Karnes County, Texas, United States.

[1] It is located on Farm to Market Road 632, just east of U.S. Highway 181 2 miles (3.2 km) south of the city of Kenedy,[2] and southeast of San Antonio.

[3] The prison, with about 813 acres (329 ha) of space, is operated by the Correctional Institutions Division of the Texas Department of Criminal Justice, administered as within Region IV.

[2] On December 13, 2000, the prison became infamous after seven inmates staged an elaborate breakout that was successful; this group later became known as the Texas Seven.

During the subsequent crime spree, the seven fugitives killed a police officer in Irving.