Central Texas is a region in the U.S. state of Texas roughly bordered on the west by San Saba, to the southeast by Bryan-College Station, the south by San Marcos and to the north by Hillsboro. Central Texas overlaps with and includes part of the Texas Hill Country and corresponds to a physiographic section designation within the Edwards Plateau, in a geographic context.
Central Texas includes the metropolitan areas of: Killeen-Temple, Bryan–College Station, Waco and Austin–Round Rock (also part of the Capital region). The Austin–Round Rock and Killeen-Temple-Fort Hood areas are among the fastest-growing metropolitan areas in the state. In the south, the Greater Austin and Greater San Antonio areas are separated from each other by approximately 80 miles (129 km) along I-35. It is anticipated that both regions may form a new metroplex similar to Dallas-Fort Worth. The largest U.S. Army installation in the country, Fort Hood, is located near Killeen.