48 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 78660 | Pflugerville | 113,386 |
| 78641 | Leander | 87,106 |
| 78745 | Austin | 61,322 |
| 78753 | Austin | 59,951 |
| 78748 | Austin | 53,550 |
| 78758 | Austin | 51,185 |
| 78704 | Austin | 50,250 |
| 78744 | Austin | 49,452 |
| 78741 | Austin | 45,780 |
| 78759 | Austin | 45,400 |
| 78723 | Austin | 37,000 |
| 78749 | Austin | 34,714 |
| 78653 | Manor | 32,884 |
| 78705 | Austin | 32,644 |
| 78754 | Austin | 31,110 |
| 78727 | Austin | 30,601 |
| 78617 | Del Valle | 29,244 |
| 78738 | Austin | 28,613 |
| 78750 | Austin | 28,564 |
| 78724 | Austin | 28,331 |
| 78746 | Austin | 28,329 |
| 78728 | Austin | 27,111 |
| 78731 | Austin | 26,314 |
| 78702 | Austin | 25,723 |
| 78757 | Austin | 25,183 |
| 78703 | Austin | 22,669 |
| 78752 | Austin | 22,599 |
| 78734 | Austin | 21,685 |
| 78747 | Austin | 21,253 |
| 78739 | Austin | 19,907 |
| 78735 | Austin | 19,793 |
| 78732 | Austin | 19,311 |
| 78751 | Austin | 16,326 |
| 78645 | Leander | 14,344 |
| 78726 | Austin | 13,696 |
| 78669 | Spicewood | 10,802 |
| 78701 | Austin | 10,659 |
| 78721 | Austin | 10,445 |
| 78725 | Austin | 9,896 |
| 78756 | Austin | 9,816 |
| 78730 | Austin | 9,746 |
| 78736 | Austin | 9,352 |
| 78733 | Austin | 9,014 |
| 78722 | Austin | 6,308 |
| 78652 | Manchaca | 5,199 |
| 78719 | Austin | 1,511 |
| 78742 | Austin | 1,241 |
| 78712 | Austin | 210 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 48 ZCTAs in Travis County, Texas (US Census).