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US ZIP Code Profile

ZIP Code 78251
San Antonio, Texas

ZIP code 78251 is in San Antonio, located in Bexar County, Texas, within the San Antonio-New Braunfels metro area. Its 2020 Census population was 58,836. The estimated median adjusted gross income per tax return is $43,766, and about 2% of filers report $200,000 or more.

2020 Population
58,836
Census ZCTA
County
Bexar
FIPS 48029
Median income (est.)
$43,766
IRS SOI 2022
Land Area
15.169 mi²
+ 0.03 mi² water

01Location & Geography

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

Primary CitySan Antonio, TX
CountyBexar County (FIPS 48029)
StateTexas (FIPS 48)
Metro Area (MSA)San Antonio-New Braunfels, TX Metro Area (41700)
Census Region / DivisionSouth Region · West South Central Division
Coordinates29.461683, -98.67673
Land / Water Area15.169 mi² land · 0.03 mi² water

02Income & Economics

Distribution of the 26,810 individual tax returns filed in 78251 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
28.1%
$25K–$50K
29.2%
$50K–$75K
17.4%
$75K–$100K
9.5%
$100K–$200K
13.5%
$200K+
2.2%
The $200,000+ bracket accounts for 12% of 78251's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($43,766) 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 78251's IRS income metrics, 2020–2022.

Median income (2021→2022)
$43,766
▲ 5.8%
Filers earning $200K+
2.2%
▲ 0.4 pt
Total filers
26,810
▼ 1.3%
GET /zipc/v2/zipcodes/78251/soi?year=… $40K 2020 $41K 2021 $44K 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 78251 ZCTA.

2000
26,070
 
2010
49,435
▲ +89.6%
2020
58,836
▲ +19.0%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78251. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78251

San Antonio and its immediate neighbors, sorted by distance.

3 mi
GET /zipc/v2/distance

Distance from 78251 to any ZIP

Enter a 5-digit ZIP to calculate the distance.

06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number487980
City AliasesSan Antonio

07Frequently Asked Questions

What county is ZIP code 78251 in?

ZIP code 78251 is in Bexar County, Texas (county FIPS code 48029).

What city is ZIP code 78251?

The primary USPS city for 78251 is San Antonio, TX.

What metro area (MSA) is 78251 in?

78251 is part of the San Antonio-New Braunfels, TX Metro Area (MSA code 41700).

What is the population of ZIP code 78251?

The 2020 Census population of 78251 was 58,836 residents.

What is the median income in ZIP code 78251?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78251 is about $43,766, 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.