48 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 78660 | Pflugerville | 124,834 |
| 78641 | Leander | 99,865 |
| 78745 | Austin | 61,219 |
| 78753 | Austin | 56,920 |
| 78748 | Austin | 55,631 |
| 78744 | Austin | 50,986 |
| 78704 | Austin | 50,688 |
| 78758 | Austin | 49,617 |
| 78741 | Austin | 45,951 |
| 78759 | Austin | 43,182 |
| 78653 | Manor | 41,291 |
| 78723 | Austin | 38,129 |
| 78749 | Austin | 34,562 |
| 78705 | Austin | 33,238 |
| 78754 | Austin | 32,690 |
| 78724 | Austin | 31,103 |
| 78738 | Austin | 31,019 |
| 78617 | Del Valle | 30,756 |
| 78727 | Austin | 29,958 |
| 78750 | Austin | 29,277 |
| 78746 | Austin | 28,256 |
| 78731 | Austin | 27,507 |
| 78728 | Austin | 26,777 |
| 78702 | Austin | 25,985 |
| 78757 | Austin | 23,856 |
| 78703 | Austin | 23,483 |
| 78752 | Austin | 23,317 |
| 78747 | Austin | 22,180 |
| 78734 | Austin | 22,145 |
| 78732 | Austin | 21,087 |
| 78735 | Austin | 20,996 |
| 78739 | Austin | 20,659 |
| 78751 | Austin | 16,961 |
| 78645 | Leander | 15,256 |
| 78726 | Austin | 14,506 |
| 78669 | Spicewood | 12,592 |
| 78701 | Austin | 11,824 |
| 78721 | Austin | 10,997 |
| 78725 | Austin | 10,746 |
| 78736 | Austin | 9,651 |
| 78756 | Austin | 9,197 |
| 78730 | Austin | 9,142 |
| 78733 | Austin | 9,029 |
| 78722 | Austin | 6,767 |
| 78652 | Manchaca | 5,287 |
| 78719 | Austin | 1,796 |
| 78742 | Austin | 847 |
| 78712 | Austin | 201 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 48 ZCTAs in Travis County, Texas (US Census).