The Gainesville State School is a juvenile correctional facility of the Texas Juvenile Justice Department in unincorporated Cooke County, Texas, near Gainesville. The fenced, maximum security state school is located on a 160-acre tract east of Gainesville, 75 miles north of Dallas, along Farm to Market Road 678 and near Interstate 35. Gainesville is a maximum security facility and is fenced. As of 2012 it is the largest juvenile correctional facility in Texas.