Population 11,340 · Census ACS 2020–24
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Population and households in ZIP 78231
Household size in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.39 | 2.85 | 2.87 | 2.68 |
| 2010–14 | 2.43 | 2.93 | 2.93 | 2.73 |
| 2015–19 | 2.59 | 3.10 | 2.95 | 2.71 |
| 2020–24 | 2.43 | 2.84 | 2.83 | 2.65 |
| Change | +0.03 | −0.01 | −0.05 | −0.03 |
The average household in ZIP 78231 has 2.43 people, under the U.S. average of 2.65. Since 2006–10, household size has crept up from 2.39, even as the national average fell. ZIP 78231 has smaller households than at least four in five Texas ZIP codes.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 41.7 | 35.1 | 34.7 | 37.7 |
| 2010–14 | 41.6 | 35.7 | 35.4 | 38.6 |
| 2015–19 | 41.0 | 36.0 | 36.1 | 39.6 |
| 2020–24 | 42.9 | 36.9 | 36.7 | 40.1 |
| Change | +1.2 | +1.8 | +2.0 | +2.3 |
The median resident of ZIP 78231 is 42.9 years old, older than the national median of 40.1. Since 2006–10, the median age has climbed from 41.7, mirroring the country. ZIP 78231 is older than at least four in five Texas ZIP codes.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.1% | 13.5% | 13.7% | 12.3% |
| 2010–14 | 7.4% | 14.0% | 13.7% | 12.3% |
| 2015–19 | 6.8% | 13.3% | 13.1% | 11.6% |
| 2020–24 | 6.3% | 13.3% | 12.9% | 11.6% |
| Change | −1.7 pts | −0.3 pts | −0.8 pts | −0.6 pts |
Single-parent households are relatively rare in ZIP 78231: 6.3% of households, against 11.6% nationally. The single-parent share has fallen 1.7 points since 2006–10, as it has nationally. Of the 1,017 Texas ZIP codes with 5,000+ people, only 97 have a lower share of single-parent households.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in ZIP 78231
Renters in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 32.7% | 34.4% | 35.2% | 33.3% |
| 2010–14 | 34.3% | 37.3% | 37.3% | 35.6% |
| 2015–19 | 38.6% | 37.4% | 38.0% | 36.0% |
| 2020–24 | 37.6% | 36.7% | 37.4% | 34.8% |
| Change | +5.0 pts | +2.2 pts | +2.3 pts | +1.5 pts |
Renting in ZIP 78231 is about as common as it is nationally: 37.6% of households rent, against 34.8%. Among homeowners, 44.9% have no mortgage at all, above the national share of 39.8%. The renter share has risen 5.0 points since 2006–10, a much bigger shift than nationally.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.6% | 10.7% | 11.8% | 11.4% |
| 2010–14 | 8.8% | 9.4% | 10.9% | 11.4% |
| 2015–19 | 7.8% | 9.3% | 10.9% | 11.1% |
| 2020–24 | 9.7% | 8.7% | 9.4% | 9.6% |
| Change | +0.1 pts | −1.9 pts | −2.4 pts | −1.8 pts |
Vacancy in ZIP 78231 is close to the national rate: 9.7% of homes are empty, against 9.6%. Vacancy has barely moved since 2006–10, while the national rate fell.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 1982 | 1984 | 1983 | 1974 |
| 2010–14 | 1984 | 1985 | 1985 | 1975 |
| 2015–19 | 1988 | 1987 | 1987 | 1977 |
| 2020–24 | 1992 | 1993 | 1992 | 1980 |
| Change | +10 | +9 | +8 | +6 |
Much of the housing in ZIP 78231 is relatively new: half of its homes were built after 1992, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1982 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northwest, while the east has the oldest housing.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | $838 | $906 | $921 | $965 |
| 2010–14 | $1,094 | $1,022 | $1,005 | $1,040 |
| 2015–19 | $1,128 | $1,173 | $1,178 | $1,213 |
| 2020–24 | $1,243 | $1,527 | $1,560 | $1,571 |
| Change | +$405 | +$621 | +$639 | +$606 |
The median renter in ZIP 78231 pays $1,243 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $405 a month since 2006–10, up 48%, a slower climb than the nation's. Rent takes 26.8% of the typical renter's income, comfortably under the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the southeast; the highest are in the northwest.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in ZIP 78231
Bachelor's degrees in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 47.0% | 26.9% | 27.0% | 28.4% |
| 2010–14 | 49.2% | 27.4% | 27.9% | 29.6% |
| 2015–19 | 53.7% | 29.0% | 30.0% | 32.1% |
| 2020–24 | 63.5% | 33.1% | 34.0% | 35.6% |
| Change | +16.5 pts | +6.2 pts | +7.1 pts | +7.2 pts |
ZIP 78231 is highly educated: nearly two-thirds of adults 25 and older (63.5%) hold at least a bachelor's degree, far above the national share of 35.6%. Since 2006–10, the share with a degree has risen 16.5 points, mirroring the country. Of the 1,017 Texas ZIP codes with 5,000+ people, only 79 have a higher share of college graduates.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 92.5% | 83.5% | 80.7% | 84.9% |
| 2010–14 | 94.1% | 84.4% | 82.0% | 86.1% |
| 2015–19 | 94.8% | 85.7% | 83.6% | 87.7% |
| 2020–24 | 98.5% | 88.1% | 85.8% | 89.3% |
| Change | +6.0 pts | +4.6 pts | +5.1 pts | +4.3 pts |
Finishing high school is nearly universal in ZIP 78231: 98.5% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Since 2006–10, the share with a diploma has risen 6.0 points, mirroring the country. Of the 1,017 Texas ZIP codes with 5,000+ people, only 20 have a higher share of high school graduates.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in ZIP 78231
| Period | ZIP 78231 | San Antonio area | Texas | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.1% | 6.8% | 7.0% | 8.1% |
| 2010–14 | 5.2% | 7.6% | 7.7% | 9.4% |
| 2015–19 | 4.9% | 5.2% | 5.1% | 5.6% |
| 2020–24 | 4.0% | 5.4% | 5.3% | 5.4% |
| Change | +0.9 pts | −1.4 pts | −1.7 pts | −2.7 pts |
Jobs have been easier to find in ZIP 78231 than nationally: unemployment was 4.0%, against 5.4%. Unemployment is up 0.9 points from 2006–10, even as the national rate fell. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
ZIP 78231 compared with nearby ZIP codes
| ZIP code | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| ZIP 78231 | 2.43 | 42.9 | 6.3% | 37.6% | 9.7% | 1992 | $1,243 | 63.5% | 98.5% | 4.0% |
| ZIP 78248 | 2.63 | 42.6 | 4.5% | 31.5% | 6.8% | 1993 | $1,522 | 65.7% | 97.4% | 2.2% |
| ZIP 78230 | 2.22 | 40.7 | 8.5% | 51.2% | 10.4% | 1985 | $1,445 | 49.3% | 93.9% | 4.1% |
| ZIP 78216 | 2.23 | 38.8 | 12.4% | 63.3% | 11.3% | 1977 | $1,409 | 34.9% | 89.5% | 5.4% |
| ZIP 78213 | 2.59 | 37.9 | 17.5% | 50.7% | 11.8% | 1966 | $1,284 | 21.7% | 81.6% | 4.7% |
| ZIP 78232 | 2.32 | 39.6 | 11.8% | 44.7% | 6.5% | 1985 | $1,559 | 52.1% | 95.5% | 3.9% |
| ZIP 78229 | 2.29 | 31.4 | 13.7% | 85.8% | 15.4% | 1982 | $1,291 | 25.8% | 84.3% | 4.4% |
| ZIP 78249 | 2.62 | 31.0 | 9.6% | 49.4% | 9.2% | 2000 | $1,681 | 51.1% | 96.0% | 6.2% |
| ZIP 78240 | 2.30 | 34.5 | 13.7% | 66.2% | 11.5% | 1991 | $1,450 | 38.7% | 91.1% | 4.0% |
| ZIP 78258 | 2.75 | 38.5 | 10.5% | 42.8% | 6.6% | 2004 | $1,820 | 63.0% | 97.1% | 4.3% |
| ZIP 78257 | 1.96 | 35.7 | 6.6% | 65.0% | 15.9% | 2013 | $1,696 | 61.0% | 96.1% | 1.4% |
All figures 2020–24.
Zip codes with similar populations: 62960, IL · 39730, MS · 42445, KY · 44026, OH · 44408, OH · 44615, OH · 45206, OH · 46802, IN · 47978, IN · 01062, MA
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up ZIP 78231. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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