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US ZIP Code Profile

ZIP Code 78704
Austin, Texas

ZIP code 78704 is in Austin, located in Travis County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 49,197. The estimated median adjusted gross income per tax return is $74,287, and about 19% of filers report $200,000 or more.

2020 Population
49,197
Census ZCTA
County
Travis
FIPS 48453
Median income (est.)
$74,287
IRS SOI 2022
Land Area
8.693 mi²
+ 0.106 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
Coordinates30.243032, -97.76508
Land / Water Area8.693 mi² land · 0.106 mi² water

02Income & Economics

Distribution of the 25,760 individual tax returns filed in 78704 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
16.3%
$25K–$50K
17.8%
$50K–$75K
16.3%
$75K–$100K
10.9%
$100K–$200K
20.2%
$200K+
18.5%
The $200,000+ bracket accounts for 70% of 78704's total adjusted gross income, from 19% of returns — a concentration that drives the gap between the median ($74,287) 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 78704's IRS income metrics, 2020–2022.

Median income (2021→2022)
$74,287
▲ 7.2%
Filers earning $200K+
18.5%
▲ 0.4 pt
Total filers
25,760
▲ 0.0%
GET /zipc/v2/zipcodes/78704/soi?year=… $61K 2020 $69K 2021 $74K 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 78704 ZCTA.

2000
43,249
 
2010
42,117
▼ -2.6%
2020
49,197
▲ +16.8%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78704. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78704

Austin and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 78704 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, Travis Heights

07Frequently Asked Questions

What county is ZIP code 78704 in?

ZIP code 78704 is in Travis County, Texas (county FIPS code 48453).

What city is ZIP code 78704?

The primary USPS city for 78704 is Austin, TX.

What metro area (MSA) is 78704 in?

78704 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78704?

The 2020 Census population of 78704 was 49,197 residents.

What is the median income in ZIP code 78704?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78704 is about $74,287, with around 19% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.