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Austin is part of Williamson County, Texas and is located in Travis County. Georgetown is the county seat of Williamson County, Texas, where Round Rock is the largest city.
Round Rock, Williamson County, Austin, Georgetown, Travis County are all in 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 | Travis 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 | Travis County, Texas