ZIP Codes Box

Williamson County, Texas ZIP codes

28ZIP codes
17Cities and towns
692,117People in ZIP areas
254, 512, 737Area codes

Williamson County is in Texas and the Central Time zone. ZIP codes don’t follow county lines exactly, so a ZIP code listed here can reach into a neighboring county.

All ZIP codes in Williamson County

ZIP codeCityTypePopulationMedian income
76511BartlettStandard2,702$69,286
76527FlorenceStandard4,918$81,574
76530GrangerStandard2,598$106,250
76537JarrellStandard16,272$98,199
76573SchwertnerPO Box only––
76574TaylorStandard20,242$78,568
76578ThrallStandard1,762$105,063
78613Cedar ParkStandard89,956$125,487
78626GeorgetownStandard48,072$100,431
78627GeorgetownPO Box only––
78628GeorgetownStandard50,822$125,635
78630Cedar ParkPO Box only––
78633GeorgetownStandard29,309$100,936
78634HuttoStandard46,413$114,426
78641LeanderStandard99,865$135,024
78642Liberty HillStandard26,434$132,958
78646LeanderPO Box only––
78651Mc NeilPO Box only––
78664Round RockStandard62,060$87,417
78665Round RockStandard66,171$122,680
78673WalburgPO Box only––
78674WeirPO Box only108–
78680Round RockPO Box only––
78681Round RockStandard56,691$137,819
78682Round RockUnique––
78683Round RockPO Box only––
78717AustinStandard37,262$145,325
78729AustinStandard30,460$86,438

Cities and towns in Williamson County

Area codes in Williamson County

Questions

How many ZIP codes are in Williamson County, TX?
Williamson County has 28 ZIP codes, 18 of them standard ZIP codes for street addresses.
What cities are in Williamson County?
Williamson County ZIP codes cover Round Rock, Georgetown, Austin, Cedar Park, Leander, Bartlett, Florence and Granger and 9 other places.
What area code is Williamson County, TX?
Williamson County uses area codes 254, 512, 737 and 830.
What time zone is Williamson County in?
Williamson County is in Central Time.

Other Texas counties