Austin,_Texas | isPartOf | Texas Texas | largestCity | Houston Austin,_Texas | isPartOf | Williamson_County,_Texas Williamson_County,_Texas | largestCity | Round_Rock,_Texas Williamson_County,_Texas | countySeat | Georgetown,_Texas
Austin is located in Texas, where the largest city is Houston. Austin forms part of Williamson County, where the County Seat is Georgetown and the largest city is Round Rock.