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US ZIP Code Profile

ZIP Code 78742
Austin, Texas

ZIP code 78742 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 964. The estimated median adjusted gross income per tax return is $35,417.

2020 Population
964
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$35,417
IRS SOI 2022
Land Area
5.765 mi²
+ 0.173 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
Coordinates30.242353, -97.6592
Land / Water Area5.765 mi² land · 0.173 mi² water

02Income & Economics

Distribution of the 320 individual tax returns filed in 78742 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
34.4%
$25K–$50K
37.5%
$50K–$75K
21.9%
$75K–$100K
0.0%
$100K–$200K
6.2%
$200K+
0.0%
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 78742's IRS income metrics, 2020–2022.

Median income (2021→2022)
$35,417
▲ 11.3%
Filers earning $200K+
0.0%
▲ 0.0 pt
Total filers
320
▼ 5.9%
GET /zipc/v2/zipcodes/78742/soi?year=… $27K 2020 $32K 2021 $35K 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 78742 ZCTA.

2000
625
 
2010
820
▲ +31.2%
2020
964
▲ +17.6%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78742. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78742

Austin and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 78742 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS 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

07Frequently Asked Questions

What county is ZIP code 78742 in?

ZIP code 78742 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78742?

The primary USPS city for 78742 is Austin, TX.

What metro area (MSA) is 78742 in?

78742 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78742?

The 2020 Census population of 78742 was 964 residents.

What is the median income in ZIP code 78742?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78742 is about $35,417. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.