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Round Rock is the largest city in Williamson County, of which Austin is a part of, in Texas. Austin is also part of Hays County in Texas. Georgetown is the county seat of Williamson County, Texas.
Austin, Texas is found in Williamson County where Georgetown is the county seat and Round Rock is the largest city.
Austin, Texas | is part of | Hays County, Texas Williamson County, Texas | largest city | Round Rock, Texas Austin, Texas | is part of | Williamson County, Texas Williamson County, Texas | county seat | Georgetown, Texas Austin, Texas | is part of | Texas Austin, Texas | is part of | Williamson County, Texas Williamson County, Texas | largest city | Round Rock, Texas Williamson County, Texas | county seat | Georgetown, Texas