Williamson County ZIP Codes
Texas, United States · 27 codes
Williamson County in Texas has 27 ZIP codes, from 76527 to 78729, serving 27 places.
ZIP codes in Williamson
| ZIP Code | Places |
|---|---|
| 76527 | Florence |
| 76530 | Granger |
| 76537 | Jarrell |
| 76573 | Schwertner |
| 76574 | Taylor |
| 76578 | Thrall |
| 78613 | Cedar Park |
| 78615 | Coupland |
| 78626 | Georgetown |
| 78627 | Georgetown |
| 78628 | Georgetown |
| 78630 | Cedar Park |
| 78633 | Georgetown |
| 78634 | Hutto |
| 78641 | Leander |
| 78642 | Liberty Hill |
| 78646 | Leander |
| 78664 | Round Rock |
| 78665 | Round Rock |
| 78673 | Walburg |
| 78674 | Weir |
| 78680 | Round Rock |
| 78681 | Round Rock |
| 78682 | Round Rock |
| 78683 | Round Rock |
| 78717 | Austin |
| 78729 | Austin |
Frequently asked questions
What is the ZIP code of Williamson?
Williamson has 27 ZIP codes, from 76527 to 78729. The table lists the places each one serves.
How many places are listed in Williamson County?
27 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.