Zip Area Code

Williamson County, Texas

Williamson County, Texas, has 20 towns and 26 ZIP codes, in area code 512, with 737 as an overlay.

Towns in Williamson County, A to Z

TownZIP codesArea codes
Austin73301, 73344, 78701, 78702, 78703, 78704 and more512, 737
Brushy Creeknearest78681, 78717, 78729512, 737
Cedar Park78613, 78630512, 737
Coupland78615512, 737
Florence76527512, 737
Georgetown78626, 78627, 78628, 78633512, 737
Granger76530512, 737
Hutto78634512, 737
Jarrell76537512, 737
Leander78641, 78645, 78646512, 737
Liberty Hill78642512, 737
Round Rock78664, 78665, 78680, 78681, 78682, 78683512, 737
Santa Rita Ranchnearest78628512, 737
Schwertner76573512, 737
Serenadanearest78633512, 737
Sonterranearest76537512, 737
Taylor76574512, 737
Thrall76578512, 737
Walburg78673512, 737
Weir78674512, 737

ZIP codes in Williamson County

Area codes in Williamson County

  • Area code 512

    In service since 1947. Shares its area with 737. Local calls are dialed with ten digits.

  • Area code 737

    In service since July 1, 2013. Shares its area with 512. Local calls are dialed with ten digits.

Local numbers in area code 512

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