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US ZIP Code Profile

ZIP Code 78218
San Antonio, Texas

ZIP code 78218 is in San Antonio, located in Bexar County, Texas, within the San Antonio-New Braunfels metro area. Its 2020 Census population was 36,137. The estimated median adjusted gross income per tax return is $35,634, and about 2% of filers report $200,000 or more.

2020 Population
36,137
Census ZCTA
County
Bexar
FIPS 48029
Median income (est.)
$35,634
IRS SOI 2022
Land Area
11.823 mi²
+ 0.02 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
Coordinates29.490047, -98.39713
Land / Water Area11.823 mi² land · 0.02 mi² water

02Income & Economics

Distribution of the 16,700 individual tax returns filed in 78218 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
36.4%
$25K–$50K
32.1%
$50K–$75K
15.2%
$75K–$100K
7.1%
$100K–$200K
7.2%
$200K+
2.0%
The $200,000+ bracket accounts for 22% of 78218's total adjusted gross income, from 2% of returns — a concentration that drives the gap between the median ($35,634) 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 78218's IRS income metrics, 2020–2022.

Median income (2021→2022)
$35,634
▲ 10.0%
Filers earning $200K+
2.0%
▼ 0.1 pt
Total filers
16,700
▼ 1.0%
GET /zipc/v2/zipcodes/78218/soi?year=… $30K 2020 $32K 2021 $36K 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 78218 ZCTA.

2000
28,194
 
2010
31,917
▲ +13.2%
2020
36,137
▲ +13.2%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 78218. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 78218

San Antonio and its immediate neighbors, sorted by distance.

3 mi
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Distance from 78218 to any ZIP

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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, Windcrest

07Frequently Asked Questions

What county is ZIP code 78218 in?

ZIP code 78218 is in Bexar County, Texas (county FIPS code 48029).

What city is ZIP code 78218?

The primary USPS city for 78218 is San Antonio, TX.

What metro area (MSA) is 78218 in?

78218 is part of the San Antonio-New Braunfels, TX Metro Area (MSA code 41700).

What is the population of ZIP code 78218?

The 2020 Census population of 78218 was 36,137 residents.

What is the median income in ZIP code 78218?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 78218 is about $35,634, 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.