PlainZIP

San Antonio, TX · standard

ZIP Code 78231

Bexar County, Texas - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

7,906
790/sq mi
$109,183
Median income
$401,800
Median home value
65.7%
Bachelor's or higher

The verdict

San Antonio pairs an upper-quartile household income with upper-quartile home values, in a low-density, homeowner-dominated area.

Top 14%
household income, US ZIPs
Top 20%
home value, US ZIPs
790
people per sq mi
66%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 78231 against every reporting US ZIP.

ZIP code 78231 is a mid-sized community (a standard USPS delivery area) in San Antonio, Bexar County, Texas, home to 7,906 residents across 10.0 square miles, a density of 790 people per square mile, in the Chicago time zone.

ZIP 78231 lands in the middle-income range, with a median household income of $109,183 (44% above the Texas average), while per-capita income is $57,828. The poverty rate stands at 5.8% and the unemployment rate at 2.7%. On housing, the median home value is $401,800 (62% above the state average) with median rent at $1,393 per month, and 66.2% of occupied units are owner-occupied.

This is a highly-educated ZIP: 65.7% of adults hold a bachelor's degree or higher, the median age is 41.2, and the average commute is -. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Bexar County, so you can benchmark 78231 against its immediate geography rather than a national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 78231

Top 5 sectors by establishment count in San Antonio, TX

Which industries have the most business establishments in ZIP 78231.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 78231, San Antonio, TX · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

7,906

Population

10.0

Area (sq mi)

790

People / sq mi

Chicago

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 78231?

41.2

Median Age

48.6%

Male

51.4%

Female

11.6%

Foreign-Born

White 61.1%
African American 4.5%
Asian 3.7%
American Indian or Alaska Native 1.2%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 25.0%
Hispanic or Latino 39.3%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$109,183

Median Household Income

+44% vs state

$57,828

Per Capita Income

5.8%

Poverty Rate

2.7%

Unemployment Rate

How ZIP 78231 ranks nationally

San Antonio, TX household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$109,183 Top 14% higher than 86% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 78.2%
Bachelor's Degree or Higher 65.7%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

4,083

Total Housing Units

3,978

Occupied Units

105

Vacant Units

2.44

Avg Household Size

Occupancy Type

Owner 66.2%
Renter 33.8%

$401,800

Median Home Value

+62% vs state

$1,393

Median Rent

1987

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+0.1%

YoY Change (2024)

306

HPI Index (2000 = 100)

+206%

Total Change Since 2000

Home values in ZIP 78231 have increased 0.1% over the past year (2024). Since 2000, this ZIP has seen +206% cumulative appreciation.

Year Annual Change HPI Index
2020 +3.8% 216
2021 +8.6% 234
2022 +20.4% 282
2023 +8.6% 306
2024 +0.1% 306

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 359 business establishments in ZIP 78231, employing approximately 4,196 people with a combined annual payroll of $251,033,000.

359

Businesses

4,196

Employees

$251.0M

Annual Payroll

15

Industry Sectors

Industry Establishments % of Total
Health care and social assistance 65 18.1%
Finance and insurance 49 13.7%
Professional, scientific, and technical services 49 13.7%
Accommodation and food services 41 11.4%
Other services (except public administration) 30 8.4%
Retail trade 27 7.5%
Real estate and rental and leasing 27 7.5%
Construction 24 6.7%
Administrative and support and waste management and remediation services 15 4.2%
Educational services 8 2.2%
Information 6 1.7%
Manufacturing 5 1.4%
Arts, entertainment, and recreation 4 1.1%
Transportation and warehousing 3 0.8%
Management of companies and enterprises 3 0.8%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 78231 vs 78248 →

ZIP 78231 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 78231 ranks #0 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 78231 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 78231 ranks #3 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
78248 San Antonio, TX 13,638 1.4 mi
78230 San Antonio, TX 39,089 2.3 mi
78232 San Antonio, TX 35,120 4.1 mi
78213 San Antonio, TX 40,396 4.4 mi
78249 San Antonio, TX 49,951 4.3 mi
78216 San Antonio, TX 40,267 4.3 mi
78229 San Antonio, TX 28,804 5.3 mi
78258 San Antonio, TX 40,586 4.8 mi
78240 San Antonio, TX 51,111 5.4 mi
78201 San Antonio, TX 45,307 7.6 mi

More ZIP Codes in Bexar County

78228 standard
San Antonio, TX
Pop: 58,811
78245 standard
San Antonio, TX
Pop: 56,511
78207 standard
San Antonio, TX
Pop: 55,514
78250 standard
San Antonio, TX
Pop: 54,903
78240 standard
San Antonio, TX
Pop: 51,111
78223 standard
San Antonio, TX
Pop: 50,637

Related Areas

Bexar County San Antonio, TX Texas

Frequently Asked Questions

What county is ZIP code 78231 in? ▼
ZIP code 78231 (San Antonio) is located in Bexar County, Texas. Bexar County contains multiple ZIP codes, see the full list at /counties/bexar-tx.
What is the population of ZIP code 78231? ▼
ZIP code 78231 in San Antonio, TX has a population of 7,906 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 78231? ▼
The median household income in ZIP 78231 is $109,183, which is 43% above the national average of $76,288.
What is the average home value in ZIP 78231? ▼
The median home value in ZIP 78231 is $401,800, which is 44% above the national average of $278,155.
What is the demographic makeup of ZIP 78231? ▼
The largest racial group in ZIP 78231 is White at 61.1%. Hispanic or Latino residents make up 39.3% of the population.
How many businesses are in ZIP code 78231? ▼
ZIP code 78231 has 359 business establishments employing approximately 4,196 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 78231? ▼
The top industries by establishment count in ZIP 78231 are: Health care and social assistance (65), Finance and insurance (49), Professional, scientific, and technical services (49). There are 15 industry sectors represented in total.
How have home values changed in ZIP code 78231? ▼
According to the FHFA House Price Index, home values in ZIP 78231 increased by 0.1% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 206%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 78231? ▼
In ZIP code 78231, 78.2% of residents aged 25+ have a high school diploma or higher, and 65.7% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 78231? ▼
In ZIP code 78231, approximately 66.2% of occupied housing units are owner-occupied and 33.8% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 78231? ▼
The poverty rate in ZIP code 78231 is 5.8% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.