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US ZIP Code Profile

ZIP Code 78751
Austin, Texas

ZIP code 78751 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 17,071. The estimated median adjusted gross income per tax return is $57,154, and about 12% of filers report $200,000 or more.

2020 Population
17,071
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$57,154
IRS SOI 2022
Land Area
2.398 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
Coordinates30.310787, -97.72275
Land / Water Area2.398 mi² land · 0 mi² water

02Income & Economics

Distribution of the 8,890 individual tax returns filed in 78751 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
19.8%
$25K–$50K
25.1%
$50K–$75K
17.9%
$75K–$100K
9.9%
$100K–$200K
15.4%
$200K+
11.9%
The $200,000+ bracket accounts for 49% of 78751's total adjusted gross income, from 12% of returns — a concentration that drives the gap between the median ($57,154) 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 78751's IRS income metrics, 2020–2022.

Median income (2021→2022)
$57,154
▲ 11.0%
Filers earning $200K+
11.9%
▲ 0.6 pt
Total filers
8,890
▲ 1.4%
GET /zipc/v2/zipcodes/78751/soi?year=… $47K 2020 $51K 2021 $57K 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 78751 ZCTA.

2000
14,005
 
2010
14,385
▲ +2.7%
2020
17,071
▲ +18.7%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78751. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78751

Austin and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 78751 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 78751 in?

ZIP code 78751 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78751?

The primary USPS city for 78751 is Austin, TX.

What metro area (MSA) is 78751 in?

78751 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78751?

The 2020 Census population of 78751 was 17,071 residents.

What is the median income in ZIP code 78751?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78751 is about $57,154, with around 12% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.