The Diboll Unit (or Diboll Correctional Center) is a state prison for men located in Diboll, Angelina County, Texas, which is operated by Texas Department of Criminal Justice.

[1] This facility was opened in June 1995, and a maximum capacity of 518 male inmates.

Diboll is adjacent to the Rufus H. Duncan Geriatric Facility at 1502 South First Street, owned and operated by the state.