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US ZIP Code Profile

ZIP Code 78717
Austin, Texas

ZIP code 78717 is in Austin, located in Williamson County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 36,987. The estimated median adjusted gross income per tax return is $93,750, and about 25% of filers report $200,000 or more.

2020 Population
36,987
Census ZCTA
County
Williamson
FIPS 48491
Median income (est.)
$93,750
IRS SOI 2022
Land Area
12.844 mi²
+ 0.082 mi² water

01Location & Geography

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

Primary CityAustin, TX
CountyWilliamson County (FIPS 48491)
StateTexas (FIPS 48)
Metro Area (MSA)Austin-Round Rock, TX Metro Area (12420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates30.489544, -97.753845
Land / Water Area12.844 mi² land · 0.082 mi² water

02Income & Economics

Distribution of the 17,140 individual tax returns filed in 78717 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.6%
$25K–$50K
14.6%
$50K–$75K
12.1%
$75K–$100K
8.9%
$100K–$200K
23.0%
$200K+
24.8%
The $200,000+ bracket accounts for 64% of 78717's total adjusted gross income, from 25% of returns — a concentration that drives the gap between the median ($93,750) 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 78717's IRS income metrics, 2020–2022.

Median income (2021→2022)
$93,750
▲ 5.6%
Filers earning $200K+
24.8%
▲ 1.8 pt
Total filers
17,140
▲ 3.8%
GET /zipc/v2/zipcodes/78717/soi?year=… $81K 2020 $89K 2021 $94K 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 78717 ZCTA.

2000
8,148
 
2010
22,538
▲ +176.6%
2020
36,987
▲ +64.1%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78717. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78717

Austin and its immediate neighbors, sorted by distance.

3 mi
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Distance from 78717 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, Brushy Creek

07Frequently Asked Questions

What county is ZIP code 78717 in?

ZIP code 78717 is in Williamson County, Texas (county FIPS code 48491).

What city is ZIP code 78717?

The primary USPS city for 78717 is Austin, TX.

What metro area (MSA) is 78717 in?

78717 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78717?

The 2020 Census population of 78717 was 36,987 residents.

What is the median income in ZIP code 78717?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78717 is about $93,750, 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.