Residential delivery area · Texas
ZIP Code 78738: Austin, TX
ZIP code 78738 uses the postal name Austin, Texas and lies entirely in Travis County (Census 2020 ZIP-county file). About 31,000 people live there (Census Bureau, ACS 2020-2024), the 15th most populous of Austin's 44 residential ZIP codes. Median household income is $183,048 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Bee Cave (20%), Lakeway (12%) and The Hills (3%); 65% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Austin · 44 residential ZIPs
- County
- Travis County
- Census places
- Bee Cave (20%); Lakeway (12%); The Hills (3%)
- Metro area
- Austin-Round Rock-San Marcos, TX
- House district
- TX-10 119th Congress
- State
- Texas
- Time zone
- Central
- Land area
- 42.1 sq mi · 737 people per sq mi
- PO Box ZIPs
- 30 more ZIP codes use the name Austin for PO boxes or single organizations
Where is ZIP code 78738?
78738 centers on 30.307°, -97.989° and covers 42.1 square miles of land plus 0.0 of water. It borders 7 ZIP codes: 78736, 78734, 78733, 78735, 78732, 78620, 78669.
The map draws ZIP code areas only. For the streets inside 78738, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 78738 compare with the rest of Austin?
| Measure | 78738 | In Austin | In Travis County | In TX |
|---|---|---|---|---|
| People (ACS 2020-2024) | 31,019 | 15th of 44 | 21st of 60 | 369th of 1,990 |
| Median household income | $183k | 5th of 39 | 5th of 52 | 13th of 1,172 |
| Median home value | $916k | 5th of 41 | 5th of 56 | 12th of 1,172 |
Its median household income is higher than in 98% of U.S. residential ZIP codes, and it is denser than 75% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 78738?
The 2020 Census counted 29,529 people in 78738; the ACS, which samples households over 2020-2024, estimates 31,019. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 31,019
- 2020 Census count
- 29,529
- Households
- 12,063
- Median age
- 43.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 78738?
Of the 31,019 people the ACS estimates in 78738, 26.7% are under 18 and 16.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (69.4%), then Asian (not Hispanic) (12.3%).
- Under 1826.7%
- 18 to 6457.1%
- 65 and older16.2%
- White, not Hispanic69.4%
- Asian, not Hispanic12.3%
- Hispanic or Latino11.9%
- Other or two or more3.6%
- Black, not Hispanic2.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 78738 earn?
Median household income is $183,048 (ACS 2020-2024), the 5th highest of the 52 ranked ZIP codes in Travis County.
- Median household income
- $183,048
- Income per person
- $99,621
- Below the poverty line
- 3.8%
- Unemployed (of the labor force)
- 3.3%
- Adults 25+ with a bachelor's degree
- 75.0%
- Adjusted gross income per tax return, 2022
- $338,28614,020 returns; wages 57% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 78738?
FHFA's house price index for 78738, built from repeat sales and appraisals of the same homes, rose 77% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved −5.5% in 2025.
- Median home value (owners' estimate)
- $916,300
- Median gross rent
- $1,983
- Homes owned by their occupants
- 75.3%
- Housing units
- 12,533
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 78738?
1,288 business establishments had a location in this ZIP code in 2023, 360 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services318
- Health care and social assistance154
- Finance and insurance123
- Retail trade117
- Real estate and rental and leasing97
- Construction88
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 78738?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 78736 | Austin | 9,651 | $94k | 4.7 mi |
| 78734 | Austin | 22,145 | $131k | 5.6 mi |
| 78733 | Austin | 9,029 | $206k | 6.3 mi |
| 78735 | Austin | 20,996 | $139k | 7.6 mi |
| 78732 | Austin | 21,087 | $193k | 7.7 mi |
| 78620 | Dripping Springs | 22,860 | $154k | 10.4 mi |
| 78669 | Spicewood | 12,592 | $128k | 12.3 mi |
| 78737 | Austin | 27,023 | $169k | 9.2 mi (near) |
| 78730 | Austin | 9,142 | $159k | 9.7 mi (near) |
| 78645 | Leander | 15,256 | $113k | 9.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.