Huntsville, Texas in the context of "Texas Department of Criminal Justice"

In criminal justice, particularly in North America, correction, corrections, and correctional, are umbrella terms describing a variety of functions typically carried out by government agencies, and involving the punishment, treatment, and supervision of persons who have been convicted of crimes. These functions commonly include imprisonment, parole, and probation. A typical correctional institution is a prison. A correctional system, also known as a penal system, thus refers to a network of agencies that administer a jurisdiction's prisons, and community-based programs like parole, and probation boards. This system is part of the larger criminal justice system, which additionally includes police, prosecution and courts.

"Corrections" is also the name of a field of academic study concerned with the theories, policies, and programs pertaining to the practice of corrections. Its object of study includes personnel training and management as well as the experiences of those on the other side of the fence — the unwilling subjects of the correctional process. Stohr and colleagues (2008) write that "Earlier scholars were more honest, calling what we now call corrections by the name penology, which means the study of punishment for crime."

Texas State Penitentiary at Huntsville or Huntsville Unit (HV), nicknamed "Walls Unit", is a Texas state prison located in Huntsville, Texas, United States. The approximately 54.36-acre (22.00 ha) facility, near downtown Huntsville, is operated by the Correctional Institutions Division of the Texas Department of Criminal Justice. The facility, the oldest Texas state prison, opened in 1849.

The unit houses the execution chamber of the State of Texas. It is the most active execution chamber in the United States, with 596 (as of September 25, 2025) executions since 1982, when the death penalty was reinstated in Texas (see Lists of people executed in Texas).