| ZIP Codes: | 78 ZIP Codes (49 Standard, 21 PO Box, 8 Unique) [See All] |
| Area Codes: | 512 / 737 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:23 PM |
| Population: | 1,302,098 [See All] |
| FIPS: | 48453 |
| CBSA: | Austin-Round Rock-San Marcos, TX |
| Land Area: | 871 sq mi |
| Water Area: | 27 sq mi |
| Coordinates: | 30.3018, -97.7568 |
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1,302,098 residents live across 78 ZIPs covering 871 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 1,076,421 to 1,302,098 from 2014 to 2024 — a +21.0% change. 40 ZIPs gained residents, 7 lost.
The county's wealthiest ZIP 78739 (Austin, $238,559 median) and poorest ZIP 78705 (Austin, $32,380) are 12.4 miles apart — a 7.4× income gap across local geography.
Median home values vary 5.3× across this county — from $281,700 in 78617 (Del Valle) to $1,495,800 in 78703 (Austin).
Density varies 174× across the county — from 96 people/sq mi in 78719 (Austin) to 16,692 in 78705 (Austin).
Most of the decade's growth concentrated around Austin — top growth ZIPs averaged +117.6% over the past ten years ( 78653 , 78738 and 78754 ).
Educational attainment ranges from 16.1% bachelor's+ in 78719 (Austin) to 86.0% in 78703 (Austin) — the breadth of educational profiles across the area.
Within Texas, this is the #5 most populous of 254 counties and ranks #8 for median household income with the #24 fastest decade growth .
On the national stage, Travis County is the #32 most populous US county .
Hosts 4 single-entity Unique ZIPs: 73301Internal Revenue Service ; 78778Tx Workforce Commission ; 78774State Comptroller ; and 78772Veterans Administration .
Weighted by population, the typical household earns about $105,386 across the county — reflecting what a typical resident sees, not a simple ZIP average.
56.3% of adults age 25+ hold a bachelor's degree or higher (519,759 of 922,435 reporting). The most-educated ZIPs cluster around Austin.
49 Standard delivery, 21 PO Box only, 8 single-entity Unique ZIPs serve this county.
22 ZIPs in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
8 ZIP codes in this county serve a single facility — typically theme parks, universities, large corporations, airports, or government complexes.
Median household income spans 7.4× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
Travis County grew 21.0% over the past decade — concentrated in 5 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 78660 | Pflugerville | Standard | 124,834 | $113,205 | 45.4 | 62.0% |
| 78745 | Austin | Standard | 61,219 | $86,109 | 13.8 | 4.0% |
| 78753 | Austin | Standard | 56,920 | $65,170 | 10.7 | 5.4% |
| 78748 | Austin | Standard | 55,631 | $115,213 | 13.5 | 23.9% |
| 78744 | Austin | Standard | 50,986 | $83,002 | 22.7 | 11.3% |
| 78704 | Austin | Standard | 50,688 | $106,897 | 8.8 | 18.5% |
| 78758 | Austin | Standard | 49,617 | $74,381 | 9.1 | 9.9% |
| 78741 | Austin | Standard | 45,951 | $66,741 | 7.9 | -10.4% |
| 78759 | Austin | Standard | 43,182 | $102,400 | 14.9 | 7.8% |
| 78653 | Manor | Standard | 41,291 | $93,900 | 105.9 | 129.8% |
| 78723 | Austin | Standard | 38,129 | $100,329 | 7.1 | 23.2% |
| 78749 | Austin | Standard | 34,562 | $111,079 | 9.5 | -1.8% |
| 78705 | Austin | Standard | 33,238 | $32,380 | 2.0 | 4.7% |
| 78754 | Austin | Standard | 32,690 | $90,121 | 14.2 | 98.2% |
| 78724 | Austin | Standard | 31,103 | $77,926 | 27.6 | 33.4% |
| 78738 | Austin | Standard | 31,019 | $183,048 | 42.6 | 124.9% |
| 78617 | Del Valle | Standard | 30,756 | $71,640 | 62.5 | 33.6% |
| 78727 | Austin | Standard | 29,958 | $110,379 | 7.6 | 1.5% |
| 78750 | Austin | Standard | 29,277 | $121,563 | 9.6 | 4.9% |
| 78746 | Austin | Standard | 28,256 | $188,414 | 23.4 | 1.1% |
| 78731 | Austin | Standard | 27,507 | $105,494 | 9.3 | 4.1% |
| 78728 | Austin | Standard | 26,777 | $75,243 | 8.2 | 28.8% |
| 78702 | Austin | Standard | 25,985 | $102,171 | 5.2 | 18.9% |
| 78757 | Austin | Standard | 23,856 | $103,860 | 4.9 | 1.8% |
| 78703 | Austin | Standard | 23,483 | $153,036 | 5.4 | 17.1% |
| 78752 | Austin | Standard | 23,317 | $67,682 | 3.4 | 18.7% |
| 78747 | Austin | Standard | 22,180 | $92,748 | 20.3 | 32.4% |
| 78734 | Austin | Standard | 22,145 | $130,784 | 23.5 | 19.7% |
| 78732 | Austin | Standard | 21,087 | $192,500 | 15.2 | 37.7% |
| 78735 | Austin | Standard | 20,996 | $139,191 | 20.7 | 19.6% |
| 78739 | Austin | Standard | 20,659 | $238,559 | 12.4 | 14.3% |
| 78751 | Austin | Standard | 16,961 | $80,915 | 2.5 | 22.6% |
| 78645 | Leander | Standard | 15,256 | $113,008 | 38.9 | 47.9% |
| 78726 | Austin | Standard | 14,506 | $90,885 | 11.4 | 13.5% |
| 78669 | Spicewood | Standard | 12,592 | $128,000 | 114.8 | 41.3% |
| 78701 | Austin | Standard | 11,824 | $162,168 | 1.7 | 91.1% |
| 78721 | Austin | Standard | 10,997 | $84,573 | 4.0 | -9.0% |
| 78725 | Austin | Standard | 10,746 | $105,795 | 17.4 | 41.2% |
| 78736 | Austin | Standard | 9,651 | $93,805 | 21.6 | 37.3% |
| 78756 | Austin | Standard | 9,197 | $94,701 | 1.7 | 5.9% |
| 78730 | Austin | Standard | 9,142 | $158,673 | 17.5 | 6.4% |
| 78733 | Austin | Standard | 9,029 | $206,368 | 11.5 | -4.0% |
| 78722 | Austin | Standard | 6,767 | $105,046 | 1.3 | 3.9% |
| 78652 | Manchaca | Standard | 5,287 | $133,368 | 13.7 | -2.2% |
| 78719 | Austin | Standard | 1,796 | $56,202 | 18.7 | -0.6% |
| 78742 | Austin | Standard | 847 | — | 6.5 | 49.6% |
| 78712 | Austin | Standard | 201 | — | 0.6 | -63.9% |
| 78713 | Austin | PO Box | — | — | 0.0 | — |
| 78710 | Austin | Standard | — | — | 0.0 | — |
| 78763 | Austin | PO Box | — | — | 0.0 | — |
| 78768 | Austin | PO Box | — | — | 0.0 | — |
| 78767 | Austin | PO Box | — | — | 0.0 | — |
| 78716 | Austin | PO Box | — | — | 0.0 | — |
| 78778 | Austin | Unique | — | — | 0.0 | — |
| 78774 | Austin | Unique | — | — | 0.0 | — |
| 78711 | Austin | PO Box | — | — | 0.0 | — |
| 78760 | Austin | PO Box | — | — | 0.0 | — |
| 73301 | Austin | Unique | — | — | 0.1 | — |
| 78772 | Austin | Unique | — | — | 0.0 | — |
| 78764 | Austin | PO Box | — | — | 0.0 | — |
| 78783 | Austin | Unique | — | — | 0.0 | — |
| 78762 | Austin | PO Box | — | — | 0.0 | — |
| 78715 | Austin | PO Box | — | — | 0.0 | — |
| 78709 | Austin | PO Box | — | — | 0.0 | — |
| 78761 | Austin | PO Box | — | — | 0.0 | — |
| 73344 | Austin | Unique | — | — | 0.0 | — |
| 78799 | Austin | Standard | — | — | 0.0 | — |
| 78779 | Austin | Unique | — | — | 0.0 | — |
| 78714 | Austin | PO Box | — | — | 0.0 | — |
| 78765 | Austin | PO Box | — | — | 0.0 | — |
| 78755 | Austin | PO Box | — | — | 0.0 | — |
| 78766 | Austin | PO Box | — | — | 0.0 | — |
| 78773 | Austin | Unique | — | — | 0.0 | — |
| 78691 | Pflugerville | PO Box | — | — | 0.0 | — |
| 78651 | Mc Neil | PO Box | — | — | 0.0 | — |
| 78720 | Austin | PO Box | — | — | 0.0 | — |
| 78718 | Austin | PO Box | — | — | 0.0 | — |
| 78708 | Austin | PO Box | — | — | 0.0 | — |