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US ZIP Code Profile

ZIP Code 78039
La Coste, Texas

ZIP code 78039 is in La Coste, located in Medina County, Texas, within the San Antonio-New Braunfels metro area. Its 2020 Census population was 1,795. The estimated median adjusted gross income per tax return is $46,739, and about 4% of filers report $200,000 or more.

2020 Population
1,795
Census ZCTA
County
Medina
FIPS 48325
Median income (est.)
$46,739
IRS SOI 2022
Land Area
18.35 mi²
+ 0.084 mi² water

01Location & Geography

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

Primary CityLa Coste, TX
CountyMedina County (FIPS 48325)
StateTexas (FIPS 48)
Metro Area (MSA)San Antonio-New Braunfels, TX Metro Area (41700)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.31215, -98.83479
Land / Water Area18.35 mi² land · 0.084 mi² water

02Income & Economics

Distribution of the 900 individual tax returns filed in 78039 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
27.8%
$25K–$50K
25.6%
$50K–$75K
18.9%
$75K–$100K
8.9%
$100K–$200K
14.4%
$200K+
4.4%
The $200,000+ bracket accounts for 24% of 78039's total adjusted gross income, from 4% of returns — a concentration that drives the gap between the median ($46,739) 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 78039's IRS income metrics, 2020–2022.

Median income (2021→2022)
$46,739
▲ 6.8%
Filers earning $200K+
4.4%
▲ 0.9 pt
Total filers
900
▲ 5.9%
GET /zipc/v2/zipcodes/78039/soi?year=… $40K 2020 $44K 2021 $47K 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 78039 ZCTA.

2000
1,649
 
2010
1,657
▲ +0.5%
2020
1,795
▲ +8.3%

05USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number484830
City AliasesLa Coste

06Frequently Asked Questions

What county is ZIP code 78039 in?

ZIP code 78039 is in Medina County, Texas (county FIPS code 48325).

What city is ZIP code 78039?

The primary USPS city for 78039 is La Coste, TX.

What metro area (MSA) is 78039 in?

78039 is part of the San Antonio-New Braunfels, TX Metro Area (MSA code 41700).

What is the population of ZIP code 78039?

The 2020 Census population of 78039 was 1,795 residents.

What is the median income in ZIP code 78039?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78039 is about $46,739, with around 4% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.