San Antonio, MO Demographics

Population 307 · Census ACS 2020–24

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Median age by neighborhoodHistory and comparison ↓︎
San Antonio, MO map of median age by neighborhood
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Population and households in San Antonio

Household size in San Antonio

Household size, people per household
PeriodSan AntonioMissouriU.S.
2006–102.752.492.68
2010–142.712.522.73
2015–192.702.502.71
2020–242.412.492.65
Change−0.34−0.00−0.03
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Households in San Antonio run small, averaging 2.41 people against 2.65 nationally, which usually means more singles and couples and fewer children. That is in line with the rest of Missouri. Household size has dropped from 2.75 in 2006–10, but in a place this small, survey estimates can swing a lot from one release to the next.

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 San Antonio

Median age, years
PeriodSan AntonioMissouriU.S.
2006–1044.238.437.7
2010–1438.239.238.6
2015–1937.640.039.6
2020–2441.940.140.1
Change−2.3+1.7+2.3
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San Antonio skews a little older than the country: its median age is 41.9, against 40.1 nationally.

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 San Antonio

Single-parent households, % of households
PeriodSan AntonioMissouriU.S.
2006–1014.5%11.3%12.3%
2010–1413.6%11.4%12.3%
2015–1910.4%10.9%11.6%
2020–247.8%11.0%11.6%
Change−6.8 pts−0.3 pts−0.6 pts
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Single-parent households are relatively rare in San Antonio: 7.8% of households, against 11.6% nationally.

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 San Antonio

Renters in San Antonio

Renters, % of occupied homes
PeriodSan AntonioMissouriU.S.
2006–1017.7%30.0%33.3%
2010–1433.1%32.1%35.6%
2015–1937.9%33.2%36.0%
2020–2439.0%31.9%34.8%
Change+21.3 pts+1.9 pts+1.5 pts
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Renting is a bit more common in San Antonio than nationally: 39.0% of households rent their homes, against 34.8% for the U.S. Among homeowners, 52.4% have no mortgage at all, well above the national share of 39.8%.

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 San Antonio

Vacant homes, % of all homes
PeriodSan AntonioMissouriU.S.
2006–1012.8%11.6%11.4%
2010–146.6%12.0%11.4%
2015–195.9%12.2%11.1%
2020–242.3%10.5%9.6%
Change−10.5 pts−1.1 pts−1.8 pts
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Empty homes are scarce in San Antonio: just 2.3% sit vacant, compared with 9.6% nationally, a sign of a tight housing market.

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 San Antonio

Age of homes, median year built
PeriodSan AntonioMissouriU.S.
2006–10197819741974
2010–14198519751975
2015–19198119761977
2020–24198719781980
Change+9+4+6
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Homes in San Antonio are newer than the national norm: the median home was built in 1987, versus 1980 across the U.S.

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 San Antonio

Rent, per month
PeriodSan AntonioMissouriU.S.
2006–10$658$740$965
2010–14$660$816$1,040
2015–19$808$899$1,213
2020–24$1,035$1,122$1,571
Change+$377+$383+$606
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The median renter in San Antonio pays $1,035 a month for rent and utilities, well below the national median of $1,571. Rent takes 27.9% of the typical renter's income, just under the 30% mark often used to define affordable rent.

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 San Antonio

Bachelor's degrees in San Antonio

Bachelor's degrees, % of adults 25+
PeriodSan AntonioMissouriU.S.
2006–1021.9%26.0%28.4%
2010–1422.8%27.3%29.6%
2015–1927.0%29.6%32.1%
2020–2433.4%32.6%35.6%
Change+11.5 pts+6.6 pts+7.2 pts
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College degrees are about as common in San Antonio as nationally: 33.4% of adults 25 and older have a bachelor's or higher, against 35.6%.

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 San Antonio

High school graduates, % of adults 25+
PeriodSan AntonioMissouriU.S.
2006–1088.3%86.8%84.9%
2010–1491.0%88.3%86.1%
2015–1992.1%90.0%87.7%
2020–2494.6%91.8%89.3%
Change+6.3 pts+5.1 pts+4.3 pts
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High school completion is high in San Antonio: 94.6% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.

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 San Antonio

Unemployment, % of the labor force
PeriodSan AntonioMissouriU.S.
2006–102.5%7.4%8.1%
2010–147.1%8.4%9.4%
2015–191.3%4.6%5.6%
2020–244.6%4.1%5.4%
Change+2.1 pts−3.3 pts−2.7 pts
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Jobs have been a little easier to find in San Antonio than nationally: unemployment was 4.6%, against 5.4%. Missouri as a whole looks much the same. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current 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).

San Antonio compared with nearby cities

CityHousehold sizeMedian ageSingle parentsRentersVacant homesMedian year builtMedian rentBachelor's degreeHigh school diplomaUnemployment
San Antonio2.4141.97.8%39.0%2.3%1987$1,03533.4%94.6%4.6%
Easton2.4242.17.6%37.8%2.9%1987$1,04233.9%94.7%4.4%
Hurlingen2.5940.55.7%27.5%5.8%1981$1,13335.7%96.2%6.5%
Cosby2.8338.43.1%17.4%3.6%1973$1,62846.8%98.7%9.1%
St. Joseph2.4540.613.2%34.8%12.7%1963$93324.6%90.0%4.2%
Country Club2.6740.811.3%30.7%3.8%1980$1,09528.5%96.6%2.7%
Clarksdale2.7039.15.2%10.8%16.6%1976$82524.8%96.8%5.9%
Agency2.6939.72.9%3.9%11.3%1984$1,03837.0%97.6%0.9%
Elwood2.8133.815.1%32.1%12.8%1982$7997.4%88.9%3.4%
Rochester2.8947.113.5%4.2%15.8%1981$91626.8%95.5%0.8%
Helena2.8746.912.9%5.3%15.4%1980$94627.4%95.7%1.2%

All figures 2020–24.

Cities with similar populations: Gunnison, MS · Sublime, TX · Harborside, ME · Hannastown, PA · Hanna, WV · Hamburg, LA · Hale, MS · Hader, MN · Hacoda, AL · Hackett, MN

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 San Antonio. 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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