The Austin–Round Rock–San Marcos metropolitan statistical area, or Greater Austin, is a five-county metropolitan area in the U.S. state of Texas, as defined by the Office of Management and Budget. The metropolitan area is situated in Central Texas on the western edge of the American South and on the eastern edge of the American Southwest, and borders Greater San Antonio to the south.

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 and the South by San Marcos 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.