What city is ZIP code 78203?

ZIP code 78203 is in San Antonio, TX (Bexar County).

What county is ZIP code 78203 in?

ZIP code 78203 is mostly in Bexar County, Texas.

How many people live in ZIP code 78203?

About 5,200 people live in the 78203 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 78203

San Antonio, TX, Bexar County

Population

5,200

Land area

1.4sq mi

People per sq mi

3,805

City

San Antonio

ZIP 78203 and nearby ZIP codes

Full map

ZIP 78203 at a glance

ZIP 78203 (San Antonio) is about 33 times as dense as Texas as a whole.
The median household income is $35,536, 55% below the Texas median of $78,476.
A typical owner-occupied home is valued at $158,000 (44% below Texas) and median rent is $1,051 a month.

Local data for ZIP 78203

Counts from official public data

Housing and community stats

ZIP 78203, American Community Survey 2020-2024

Full profile

Median household income

$35,536

Poverty rate

39.1%

Median home value

$158,000

Median rent

$1,051/mo

Homeownership

45.1%

Bachelor's or higher

10.8%

Median age

33.4

Average commute

22.1 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

ZIP Business Patterns 2023

Employees

805

$38.4M annual payroll

PPP loans

$6.7M

120 loans

Campaign donations

$6,546

94% D, 4% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 78203, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively High

Top: hail

Storm events since 1996

1,353

Countywide, mostly hail

Flood insurance policies

4,411

0.8% of homes, county

July high / Jan low

94° / 40°F

34.0 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 78203, CDC PLACES estimates

All 40 measures

Obesity

41.3%

U.S. 33.3% +8.0 pts

Diabetes

20.1%

U.S. 12.1% +8.0 pts

Smoking

18.2%

U.S. 12.8% +5.4 pts

Uninsured (18-64)

34.1%

U.S. 11.1% +23.0 pts

Frequently asked questions

What city is ZIP code 78203?: ZIP code 78203 is in San Antonio, TX (Bexar County).
What county is ZIP code 78203 in?: ZIP code 78203 is mostly in Bexar County, Texas.
How many people live in ZIP code 78203?: About 5,200 people live in the 78203 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.