48 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 78660 | Pflugerville | 118,437 |
| 78641 | Leander | 93,399 |
| 78745 | Austin | 61,122 |
| 78753 | Austin | 58,449 |
| 78748 | Austin | 54,942 |
| 78744 | Austin | 51,069 |
| 78758 | Austin | 50,592 |
| 78704 | Austin | 50,479 |
| 78741 | Austin | 45,274 |
| 78759 | Austin | 44,882 |
| 78723 | Austin | 36,307 |
| 78653 | Manor | 35,417 |
| 78749 | Austin | 34,939 |
| 78705 | Austin | 32,937 |
| 78754 | Austin | 31,410 |
| 78727 | Austin | 30,894 |
| 78724 | Austin | 29,326 |
| 78750 | Austin | 29,322 |
| 78617 | Del Valle | 28,932 |
| 78738 | Austin | 28,790 |
| 78746 | Austin | 28,268 |
| 78731 | Austin | 27,136 |
| 78728 | Austin | 26,776 |
| 78702 | Austin | 26,495 |
| 78757 | Austin | 24,327 |
| 78703 | Austin | 22,484 |
| 78752 | Austin | 22,261 |
| 78734 | Austin | 22,091 |
| 78747 | Austin | 21,757 |
| 78739 | Austin | 20,850 |
| 78732 | Austin | 20,646 |
| 78735 | Austin | 20,112 |
| 78751 | Austin | 16,027 |
| 78645 | Leander | 15,042 |
| 78726 | Austin | 14,117 |
| 78669 | Spicewood | 11,980 |
| 78701 | Austin | 11,114 |
| 78725 | Austin | 10,810 |
| 78721 | Austin | 10,728 |
| 78736 | Austin | 9,849 |
| 78756 | Austin | 9,844 |
| 78730 | Austin | 9,669 |
| 78733 | Austin | 9,339 |
| 78722 | Austin | 6,576 |
| 78652 | Manchaca | 5,012 |
| 78719 | Austin | 1,556 |
| 78742 | Austin | 638 |
| 78712 | Austin | 206 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 48 ZCTAs in Travis County, Texas (US Census).