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US ZIP Code Profile

ZIP Code 78613
Cedar Park, Texas

ZIP code 78613 is in Cedar Park, located in Williamson County, Texas, within the Austin-Round Rock metro area. Its 2020 Census population was 89,279. The estimated median adjusted gross income per tax return is $73,103, and about 18% of filers report $200,000 or more.

2020 Population
89,279
Census ZCTA
County
Williamson
FIPS 48491
Median income (est.)
$73,103
IRS SOI 2022
Land Area
28.153 mi²
+ 0.128 mi² water

01Location & Geography

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

Primary CityCedar Park, 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
Coordinates30.50391, -97.82418
Land / Water Area28.153 mi² land · 0.128 mi² water

02Income & Economics

Distribution of the 39,600 individual tax returns filed in 78613 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
20.7%
$25K–$50K
17.3%
$50K–$75K
13.0%
$75K–$100K
9.2%
$100K–$200K
21.9%
$200K+
17.9%
The $200,000+ bracket accounts for 56% of 78613's total adjusted gross income, from 18% of returns — a concentration that drives the gap between the median ($73,103) 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 78613's IRS income metrics, 2020–2022.

Median income (2021→2022)
$73,103
▲ 5.1%
Filers earning $200K+
17.9%
▲ 1.6 pt
Total filers
39,600
▲ 0.9%
GET /zipc/v2/zipcodes/78613/soi?year=… $64K 2020 $70K 2021 $73K 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 78613 ZCTA.

2000
34,250
 
2010
65,099
▲ +90.1%
2020
89,279
▲ +37.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number481565
City AliasesCedar Park

06Frequently Asked Questions

What county is ZIP code 78613 in?

ZIP code 78613 is in Williamson County, Texas (county FIPS code 48491).

What city is ZIP code 78613?

The primary USPS city for 78613 is Cedar Park, TX.

What metro area (MSA) is 78613 in?

78613 is part of the Austin-Round Rock, TX Metro Area (MSA code 12420).

What is the population of ZIP code 78613?

The 2020 Census population of 78613 was 89,279 residents.

What is the median income in ZIP code 78613?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78613 is about $73,103, with around 18% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.