Huntsville is a city in and the county seat of Walker County, Texas, United States. The population is 38,548 as of the 2010 census. It is the center of the Huntsville micropolitan area. It is located approximately seventy miles north of Houston in the East TexasPiney Woods on Interstate 45, which runs between Houston and Dallas. Huntsville is home to Sam Houston State University, the Texas Department of Criminal Justice, Huntsville State Park, the HEARTS Veterans Museum of Texas, located on Texas Veterans Memorial Parkway at Interstate 45, and the Texas Prison Museum, also on Highway 75 near Interstate 45. Huntsville served as the residence of Sam Houston, who is recognized in Huntsville by the Sam Houston Memorial Museum and a statue on Interstate 45.