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US ZIP Code Profile

ZIP Code 78626
Georgetown, Texas

ZIP code 78626 is in Georgetown, located in Williamson County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 39,935. The estimated median adjusted gross income per tax return is $57,738, and about 6% of filers report $200,000 or more.

2020 Population
39,935
Census ZCTA
County
Williamson
FIPS 48491
Median income (est.)
$57,738
IRS SOI 2022
Land Area
93.08 mi²
+ 0.763 mi² water

01Location & Geography

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

Primary CityGeorgetown, 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
Coordinates30.657894, -97.61784
Land / Water Area93.08 mi² land · 0.763 mi² water

02Income & Economics

Distribution of the 22,260 individual tax returns filed in 78626 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
21.5%
$25K–$50K
23.3%
$50K–$75K
17.0%
$75K–$100K
11.5%
$100K–$200K
20.4%
$200K+
6.4%
The $200,000+ bracket accounts for 31% of 78626's total adjusted gross income, from 6% of returns — a concentration that drives the gap between the median ($57,738) 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 78626's IRS income metrics, 2020–2022.

Median income (2021→2022)
$57,738
▲ 7.1%
Filers earning $200K+
6.4%
▲ 0.4 pt
Total filers
22,260
▲ 6.9%
GET /zipc/v2/zipcodes/78626/soi?year=… $49K 2020 $54K 2021 $58K 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 78626 ZCTA.

2000
19,630
 
2010
25,996
▲ +32.4%
2020
39,935
▲ +53.6%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78626. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78626

Georgetown and its immediate neighbors, sorted by distance.

3 mi
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Distance from 78626 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number483475
City AliasesGeorgetown, Jonah

07Frequently Asked Questions

What county is ZIP code 78626 in?

ZIP code 78626 is in Williamson County, Texas (county FIPS code 48491).

What city is ZIP code 78626?

The primary USPS city for 78626 is Georgetown, TX.

What metro area (MSA) is 78626 in?

78626 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78626?

The 2020 Census population of 78626 was 39,935 residents.

What is the median income in ZIP code 78626?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78626 is about $57,738, with around 6% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.