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US ZIP Code Profile

ZIP Code 78735
Austin, Texas

ZIP code 78735 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 20,983. The estimated median adjusted gross income per tax return is $86,557, and about 25% of filers report $200,000 or more.

2020 Population
20,983
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$86,557
IRS SOI 2022
Land Area
20.547 mi²
+ 0 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityAustin, TX
CountyTravis County (FIPS 48453)
StateTexas (FIPS 48)
Metro Area (MSA)Austin-Round Rock, TX Metro Area (12420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.269121, -97.86881
Land / Water Area20.547 mi² land · 0 mi² water

02Income & Economics

Distribution of the 10,360 individual tax returns filed in 78735 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.4%
$25K–$50K
14.9%
$50K–$75K
14.0%
$75K–$100K
10.2%
$100K–$200K
19.3%
$200K+
25.2%
The $200,000+ bracket accounts for 84% of 78735's total adjusted gross income, from 25% of returns — a concentration that drives the gap between the median ($86,557) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 78735's IRS income metrics, 2020–2022.

Median income (2021→2022)
$86,557
▲ 7.3%
Filers earning $200K+
25.2%
▲ 0.5 pt
Total filers
10,360
▲ 1.7%
GET /zipc/v2/zipcodes/78735/soi?year=… $72K 2020 $81K 2021 $87K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 78735 ZCTA.

2000
9,671
 
2010
16,131
▲ +66.8%
2020
20,983
▲ +30.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number480420
City AliasesAustin, Oak Hill, Sunset Valley

06Frequently Asked Questions

What county is ZIP code 78735 in?

ZIP code 78735 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78735?

The primary USPS city for 78735 is Austin, TX.

What metro area (MSA) is 78735 in?

78735 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78735?

The 2020 Census population of 78735 was 20,983 residents.

What is the median income in ZIP code 78735?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78735 is about $86,557, with around 25% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.