Population 5,126 · Census ACS 2020–24
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Population and households in South Post
Household size in South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 3.80 | 3.66 | 2.73 | 2.63 | 2.68 |
| 2010–14 | 3.70 | 3.71 | 2.82 | 2.68 | 2.73 |
| 2015–19 | 3.95 | 3.84 | 2.86 | 2.68 | 2.71 |
| 2020–24 | 4.07 | 3.96 | 2.77 | 2.62 | 2.65 |
| Change | +0.26 | +0.30 | +0.04 | −0.01 | −0.03 |
South Post is a place of big households: 4.07 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Since 2006–10, household size has climbed from 3.80, even as the national average fell.
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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 20.8 | 22.0 | 37.0 | 38.2 | 37.7 |
| 2010–14 | 25.3 | 24.4 | 37.6 | 39.0 | 38.6 |
| 2015–19 | 20.8 | 21.0 | 38.5 | 40.0 | 39.6 |
| 2020–24 | 20.2 | 21.1 | 39.2 | 40.3 | 40.1 |
| Change | −0.6 | −0.9 | +2.2 | +2.1 | +2.3 |
With a median age of just 20.2, South Post is far younger than the country as a whole (40.1), a population that tilts toward families with many children. Fort Belvoir as a whole looks much the same. The median age has edged down from 20.8 in 2006–10, even as the national median rose.
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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 15.5% | 14.3% | 11.3% | 11.1% | 12.3% |
| 2010–14 | 10.6% | 11.6% | 11.3% | 11.0% | 12.3% |
| 2015–19 | 10.1% | 8.8% | 10.4% | 10.5% | 11.6% |
| 2020–24 | 9.5% | 8.0% | 10.4% | 10.7% | 11.6% |
| Change | −6.0 pts | −6.3 pts | −0.9 pts | −0.4 pts | −0.6 pts |
Single-parent households are less common in South Post than nationally: 9.5%, against 11.6%. Even so, single parents are more common here than in Fort Belvoir overall (8.0%). Since 2006–10, the single-parent share has fallen 6.0 points, a much bigger shift than 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 South Post
Renters in South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 100.0% | 99.8% | 34.0% | 31.1% | 33.3% |
| 2010–14 | 99.2% | 99.5% | 36.6% | 33.3% | 35.6% |
| 2015–19 | 98.8% | 98.3% | 36.8% | 33.7% | 36.0% |
| 2020–24 | 99.9% | 99.1% | 36.3% | 32.7% | 34.8% |
| Change | −0.1 pts | −0.7 pts | +2.3 pts | +1.5 pts | +1.5 pts |
Most households in South Post rent: 99.9% of occupied homes are rented, far above the national share of 34.8%. Expect more apartments, and more turnover, than in owner-heavy areas. Among homeowners, 27.8% have no mortgage at all, well below 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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 9.1% | 11.9% | 8.7% | 10.3% | 11.4% |
| 2010–14 | 8.6% | 8.5% | 7.3% | 10.2% | 11.4% |
| 2015–19 | 11.2% | 10.0% | 6.6% | 9.7% | 11.1% |
| 2020–24 | 12.3% | 13.1% | 5.9% | 8.7% | 9.6% |
| Change | +3.2 pts | +1.2 pts | −2.8 pts | −1.6 pts | −1.8 pts |
A few more homes sit empty in South Post than nationally: 12.3%, against 9.6%. The count includes vacation homes and homes between owners or tenants, not just abandoned ones. Vacancy is up 3.2 points from 2006–10, even as 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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 1972 | 1979 | 1977 | 1978 | 1974 |
| 2010–14 | 1988 | 1992 | 1978 | 1980 | 1975 |
| 2015–19 | 1985 | 1990 | 1979 | 1981 | 1977 |
| 2020–24 | 1995 | 1997 | 1982 | 1984 | 1980 |
| Change | +23 | +18 | +6 | +5 | +6 |
South Post has newer housing than the country as a whole: the median home was built in 1995, versus 1980 nationally. That is in line with the rest of Fort Belvoir. The median year built has moved up from 1972 in 2006–10, a sign of steady new building.
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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | $2,001 | $1,949 | $1,470 | $1,143 | $965 |
| 2010–14 | $2,001 | $1,959 | $1,583 | $1,238 | $1,040 |
| 2015–19 | $2,815 | $2,699 | $1,907 | $1,436 | $1,213 |
| 2020–24 | $3,255 | $3,113 | $2,236 | $1,743 | $1,571 |
| Change | +$1,254 | +$1,164 | +$766 | +$600 | +$606 |
The median renter in South Post pays $3,255 a month for rent and utilities, well above the national median of $1,571. Rents are up $1,254 a month from 2006–10, a 63% jump, roughly in step with the nation. Rent takes 38.5% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched.
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 South Post
Bachelor's degrees in South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 32.4% | 33.2% | 46.6% | 35.2% | 28.4% |
| 2010–14 | 46.5% | 40.3% | 48.2% | 36.7% | 29.6% |
| 2015–19 | 50.2% | 43.6% | 51.0% | 39.3% | 32.1% |
| 2020–24 | 62.3% | 55.6% | 53.9% | 42.5% | 35.6% |
| Change | +29.9 pts | +22.4 pts | +7.3 pts | +7.3 pts | +7.2 pts |
College graduates are unusually common in South Post: 62.3% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. The share with a degree has risen 29.9 points since 2006–10, a much bigger shift than nationally.
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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 97.6% | 96.5% | 89.4% | 86.8% | 84.9% |
| 2010–14 | 99.3% | 98.1% | 90.2% | 88.3% | 86.1% |
| 2015–19 | 97.0% | 97.5% | 90.8% | 89.9% | 87.7% |
| 2020–24 | 98.7% | 98.0% | 91.2% | 91.6% | 89.3% |
| Change | +1.1 pts | +1.6 pts | +1.7 pts | +4.7 pts | +4.3 pts |
Finishing high school is nearly universal in South Post: 98.7% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The picture is much the same across Fort Belvoir. The share with a diploma has edged up 1.1 points since 2006–10, a smaller shift than nationally.
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 South Post
| Period | South Post | Fort Belvoir | Washington area | Virginia | U.S. |
|---|---|---|---|---|---|
| 2006–10 | 5.5% | 11.4% | 5.9% | 6.0% | 8.1% |
| 2010–14 | 13.0% | 15.2% | 6.9% | 7.0% | 9.4% |
| 2015–19 | 8.0% | 6.8% | 4.7% | 4.7% | 5.6% |
| 2020–24 | 5.3% | 4.8% | 4.8% | 4.3% | 5.4% |
| Change | −0.1 pts | −6.5 pts | −1.1 pts | −1.7 pts | −2.7 pts |
Unemployment in South Post is close to the national rate: 5.3% of the labor force, against 5.4%. 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).
South Post compared with nearby neighborhoods
| Neighborhood | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| South Post | 4.07 | 20.2 | 9.5% | 99.9% | 12.3% | 1995 | $3,255 | 62.3% | 98.7% | 5.3% |
| Mt Vernon | 2.74 | 44.1 | 7.2% | 29.8% | 3.7% | 1974 | $2,724 | 62.9% | 96.9% | 3.6% |
| Woodlawn | 2.83 | 37.6 | 14.6% | 41.3% | 5.6% | 1974 | $2,018 | 32.6% | 79.7% | 5.9% |
| Hybla Valley | 3.10 | 38.2 | 13.3% | 39.9% | 6.2% | 1974 | $1,946 | 39.0% | 81.7% | 3.8% |
| Groveton | 2.76 | 38.0 | 20.1% | 53.2% | 11.4% | 1980 | $2,108 | 42.1% | 81.3% | 8.3% |
| Rose Hill | 2.96 | 40.1 | 8.2% | 16.9% | 3.8% | 1974 | $2,841 | 64.5% | 94.3% | 3.0% |
| Belle Haven | 2.37 | 43.9 | 3.4% | 25.9% | 8.3% | 1959 | $2,482 | 70.1% | 94.8% | 3.4% |
| Landmark-Van Dom | 1.98 | 39.2 | 6.9% | 59.6% | 6.3% | 1983 | $2,128 | 55.0% | 95.1% | 3.8% |
| North Springfield | 2.92 | 41.0 | 7.4% | 20.0% | 9.0% | 1962 | $2,609 | 54.8% | 91.1% | 5.8% |
| Eisenhower East | 1.56 | 39.4 | 5.6% | 83.2% | 6.7% | 2006 | $2,665 | 81.4% | 98.3% | 2.7% |
| Southwest Quadrant | 1.74 | 37.0 | 5.9% | 60.4% | 7.0% | 1992 | $2,230 | 82.2% | 96.4% | 2.6% |
All figures 2020–24.
Neighborhoods with similar populations: Villages at Rancho El Dorado, Silver Bell, AZ · College Hill, Wichita, KS · College Park, Mobile, AL · Como, Fort Worth, TX · Cooper Park, Bozeman, MT · Csus, Sacramento, CA · Dam Neck Naval Air Station, Virginia Beach, VA · El Miradero, Glendale, CA · Fairlane, Kansas City, MO · Farm Hills, Redwood City, CA
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 South Post. 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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