Get API Key →
US ZIP Code Profile

ZIP Code 78728
Austin, Texas

ZIP code 78728 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 25,555. The estimated median adjusted gross income per tax return is $49,085, and about 7% of filers report $200,000 or more.

2020 Population
25,555
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$49,085
IRS SOI 2022
Land Area
8.11 mi²
+ 0.017 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
Coordinates30.45417, -97.692184
Land / Water Area8.11 mi² land · 0.017 mi² water

02Income & Economics

Distribution of the 12,780 individual tax returns filed in 78728 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
23.2%
$25K–$50K
27.8%
$50K–$75K
17.2%
$75K–$100K
9.5%
$100K–$200K
15.7%
$200K+
6.6%
The $200,000+ bracket accounts for 27% of 78728's total adjusted gross income, from 7% of returns — a concentration that drives the gap between the median ($49,085) 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 78728's IRS income metrics, 2020–2022.

Median income (2021→2022)
$49,085
▲ 6.1%
Filers earning $200K+
6.6%
▲ 1.1 pt
Total filers
12,780
▼ 0.5%
GET /zipc/v2/zipcodes/78728/soi?year=… $43K 2020 $46K 2021 $49K 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 78728 ZCTA.

2000
17,298
 
2010
20,299
▲ +17.3%
2020
25,555
▲ +25.9%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78728. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78728

Austin and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 78728 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 78728 in?

ZIP code 78728 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78728?

The primary USPS city for 78728 is Austin, TX.

What metro area (MSA) is 78728 in?

78728 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78728?

The 2020 Census population of 78728 was 25,555 residents.

What is the median income in ZIP code 78728?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78728 is about $49,085, with around 7% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.