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U.S. ZIP Code 78683
5-digit United States postal code #78683, Round Rock, TX
ZIP: 78683
County: Williamson
Place Name: Round Rock
State: Texas
State Abbreviation: TX
Coordinates: 30° 39' 24.48" N, 97° 36' 9.36" W
Latitude: 30.656800000000
Longitude: -97.602600000000