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US ZIP Code Profile

ZIP Code 78591
Santa Elena, Texas

ZIP code 78591 is in Santa Elena, located in Starr County, Texas, within the Rio Grande City metro area. Its 2020 Census population was 341. The estimated median adjusted gross income per tax return is $40,625.

2020 Population
341
Census ZCTA
County
Starr
FIPS 48427
Median income (est.)
$40,625
IRS SOI 2022
Land Area
124.79 mi²
+ 0.048 mi² water

01Location & Geography

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

Primary CitySanta Elena, TX
CountyStarr County (FIPS 48427)
StateTexas (FIPS 48)
Metro Area (MSA)Rio Grande City, TX Micro Area (40100)
Census Region / DivisionSouth Region · West South Central Division
Coordinates26.58293, -98.52163
Land / Water Area124.79 mi² land · 0.048 mi² water

02Income & Economics

Distribution of the 150 individual tax returns filed in 78591 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
33.3%
$25K–$50K
26.7%
$50K–$75K
20.0%
$75K–$100K
0.0%
$100K–$200K
20.0%
$200K+
0.0%
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 78591's IRS income metrics, 2020–2022.

Median income (2021→2022)
$40,625
▲ 35.4%
Filers earning $200K+
0.0%
▲ 0.0 pt
Total filers
150
▲ 7.1%
GET /zipc/v2/zipcodes/78591/soi?year=… $34K 2020 $30K 2021 $41K 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 78591 ZCTA.

2010
265
 
2020
341
▲ +28.7%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortC
USPS Finance Number488095
City AliasesLa Gloria, Santa Elena

06Frequently Asked Questions

What county is ZIP code 78591 in?

ZIP code 78591 is in Starr County, Texas (county FIPS code 48427).

What city is ZIP code 78591?

The primary USPS city for 78591 is Santa Elena, TX.

What metro area (MSA) is 78591 in?

78591 is part of the Rio Grande City, TX Micro Area (MSA code 40100).

What is the population of ZIP code 78591?

The 2020 Census population of 78591 was 341 residents.

What is the median income in ZIP code 78591?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78591 is about $40,625. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.