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US ZIP Code Profile

ZIP Code 78566
Los Fresnos, Texas

ZIP code 78566 is in Los Fresnos, located in Cameron County, Texas, within the Brownsville-Harlingen metro area. Its 2020 Census population was 23,704. The estimated median adjusted gross income per tax return is $34,495, and about 2% of filers report $200,000 or more.

2020 Population
23,704
Census ZCTA
County
Cameron
FIPS 48061
Median income (est.)
$34,495
IRS SOI 2022
Land Area
115.08 mi²
+ 51.419 mi² water

01Location & Geography

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

Primary CityLos Fresnos, TX
CountyCameron County (FIPS 48061)
StateTexas (FIPS 48)
Metro Area (MSA)Brownsville-Harlingen, TX Metro Area (15180)
Census Region / DivisionSouth Region · West South Central Division
Coordinates26.148405, -97.37038
Land / Water Area115.08 mi² land · 51.419 mi² water

02Income & Economics

Distribution of the 10,020 individual tax returns filed in 78566 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
39.1%
$25K–$50K
28.6%
$50K–$75K
13.3%
$75K–$100K
7.3%
$100K–$200K
10.0%
$200K+
1.7%
The $200,000+ bracket accounts for 11% of 78566's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($34,495) 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 78566's IRS income metrics, 2020–2022.

Median income (2021→2022)
$34,495
▲ 8.9%
Filers earning $200K+
1.7%
▲ 0.2 pt
Total filers
10,020
▲ 3.3%
GET /zipc/v2/zipcodes/78566/soi?year=… $29K 2020 $32K 2021 $34K 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 78566 ZCTA.

2000
12,274
 
2010
16,230
▲ +32.2%
2020
23,704
▲ +46.1%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number485350
City AliasesLos Fresnos, Bayview, Indian Lake

06Frequently Asked Questions

What county is ZIP code 78566 in?

ZIP code 78566 is in Cameron County, Texas (county FIPS code 48061).

What city is ZIP code 78566?

The primary USPS city for 78566 is Los Fresnos, TX.

What metro area (MSA) is 78566 in?

78566 is part of the Brownsville-Harlingen, TX Metro Area (MSA code 15180).

What is the population of ZIP code 78566?

The 2020 Census population of 78566 was 23,704 residents.

What is the median income in ZIP code 78566?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78566 is about $34,495, with around 2% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.