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US ZIP Code Profile

ZIP Code 78748
Austin, Texas

ZIP code 78748 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 55,226. The estimated median adjusted gross income per tax return is $62,651, and about 9% of filers report $200,000 or more.

2020 Population
55,226
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$62,651
IRS SOI 2022
Land Area
12.678 mi²
+ 0.001 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
Coordinates30.166435, -97.82339
Land / Water Area12.678 mi² land · 0.001 mi² water

02Income & Economics

Distribution of the 27,480 individual tax returns filed in 78748 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.6%
$25K–$50K
22.2%
$50K–$75K
18.1%
$75K–$100K
11.0%
$100K–$200K
21.5%
$200K+
8.5%
The $200,000+ bracket accounts for 32% of 78748's total adjusted gross income, from 9% of returns — a concentration that drives the gap between the median ($62,651) 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 78748's IRS income metrics, 2020–2022.

Median income (2021→2022)
$62,651
▲ 9.3%
Filers earning $200K+
8.5%
▲ 1.4 pt
Total filers
27,480
▼ 0.1%
GET /zipc/v2/zipcodes/78748/soi?year=… $50K 2020 $57K 2021 $63K 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 78748 ZCTA.

2000
25,361
 
2010
40,651
▲ +60.3%
2020
55,226
▲ +35.9%

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, San Leanna

06Frequently Asked Questions

What county is ZIP code 78748 in?

ZIP code 78748 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78748?

The primary USPS city for 78748 is Austin, TX.

What metro area (MSA) is 78748 in?

78748 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78748?

The 2020 Census population of 78748 was 55,226 residents.

What is the median income in ZIP code 78748?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78748 is about $62,651, with around 9% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.