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US ZIP Code Profile

ZIP Code 77521
Baytown, Texas

ZIP code 77521 is in Baytown, located in Harris County, Texas, within the Houston-The Woodlands-Sugar Land metro area. Its 2020 Census population was 65,058. The estimated median adjusted gross income per tax return is $45,995, and about 3% of filers report $200,000 or more.

2020 Population
65,058
Census ZCTA
County
Harris
FIPS 48201
Median income (est.)
$45,995
IRS SOI 2022
Land Area
41.504 mi²
+ 0.443 mi² water

01Location & Geography

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

Primary CityBaytown, TX
CountyHarris County (FIPS 48201)
StateTexas (FIPS 48)
Metro Area (MSA)Houston-The Woodlands-Sugar Land, TX Metro Area (26420)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.801949, -94.97171
Land / Water Area41.504 mi² land · 0.443 mi² water

02Income & Economics

Distribution of the 29,110 individual tax returns filed in 77521 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
29.9%
$25K–$50K
23.9%
$50K–$75K
16.3%
$75K–$100K
10.9%
$100K–$200K
15.8%
$200K+
3.2%
The $200,000+ bracket accounts for 16% of 77521's total adjusted gross income, from 3% of returns — a concentration that drives the gap between the median ($45,995) 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 77521's IRS income metrics, 2020–2022.

Median income (2021→2022)
$45,995
▲ 7.3%
Filers earning $200K+
3.2%
▲ 0.4 pt
Total filers
29,110
▲ 2.5%
GET /zipc/v2/zipcodes/77521/soi?year=… $41K 2020 $43K 2021 $46K 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 77521 ZCTA.

2000
37,976
 
2010
49,507
▲ +30.4%
2020
65,058
▲ +31.4%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number480600
City AliasesBaytown, Mont Belvieu

06Frequently Asked Questions

What county is ZIP code 77521 in?

ZIP code 77521 is in Harris County, Texas (county FIPS code 48201).

What city is ZIP code 77521?

The primary USPS city for 77521 is Baytown, TX.

What metro area (MSA) is 77521 in?

77521 is part of the Houston-The Woodlands-Sugar Land, TX Metro Area (MSA code 26420).

What is the population of ZIP code 77521?

The 2020 Census population of 77521 was 65,058 residents.

What is the median income in ZIP code 77521?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 77521 is about $45,995, with around 3% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.