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Zip Code 78521 — Brownsville, TX

78521 is a ZIP Code associated with Brownsville, TX, located within Cameron. The postal region supports an estimated population of 87,380 residents across Data Pending housing units, with a population density of 359.9 people per square mile.

WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (25.951090, -97.320780)

Data Metric	Local Statistic
Postal / Zip Code	78521
Primary City	Brownsville
State / Province	TX
County	Cameron
Total Population	87,380
Median Household Income	Data Pending
Total Housing Units	Data Pending
Population Density	359.9 people/sq mi
Timezone	America/Chicago

How 78521 Compares

Metric	ZIP 78521	Cameron County	TX State Average
Population	87,380	425,684	30,188,035
Median Income	Data Pending	N/A	N/A
Population Density	359.9 /sq mi	--	--

Nearby ZIP Codes

ZIP Code	City	Distance	Population	Median Income
Zip 78578	Port Isabel	7.1 mi	10,016	N/A
Zip 78526	Brownsville	8.6 mi	60,012	N/A
Zip 78566	Los Fresnos	14.2 mi	25,110	N/A
Zip 78520	Brownsville	14.3 mi	64,740	N/A
Zip 78575	Olmito	15.4 mi	4,575	N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →