Williamson County, Texas ZIP Codes

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ZIP Codes in Williamson County with Associated Cities & Towns

Williamson County, TX - Standard ZIP Codes
76511 | 76527 | 76530 | 76537 | 76574 | 76577 | 76578 | 78613 | 78615 | 78621 | 78626 | 78628 | 78633 | 78634 | 78641 | 78642 | 78664 | 78665 | 78681 | 78717 | 78727 | 78728 | 78729 | 78750 | 78759
Williamson County, TX - PO Box ZIP Codes (NO DEMOGRAPHIC DATA)
76573 | 78627 | 78630 | 78646 | 78673 | 78674 | 78680 | 78683
Williamson County, TX - Unique - Single Entity ZIP Codes (NO DEMOGRAPHIC DATA)
78682
Note: Every ZIP Code has a single ACTUAL City Name assigned by the US Postal Service (USPS).
See the specific ZIP Code for acceptable Alternate City Names and spelling variations.

ZIP Codes in Williamson County Address Data

  • Businesses Addresses: 19,995
  • PO Box Addresses: 10,404
  • Residential Addresses: 290,652
    • Multi-Family Addresses: 67,293
    • Single Family Addresses: 218,553

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Map of Williamson County, TX ZIP Codes With Actual (Default) City Names

Austin
Cedar Park
Coupland
Florence
Georgetown
Granger
Hutto
Jarrell
Leander
Liberty Hill
Round Rock
Schwertner
Taylor
Thrall
Walburg
Weir


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