Population 30,166 · Census ACS 2020–24
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Population and households in ZIP 20721
Household size in ZIP 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.99 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 3.00 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 3.11 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 2.85 | 2.77 | 2.68 | 2.65 |
| Change | −0.14 | +0.04 | +0.01 | −0.03 |
The typical household in ZIP 20721 holds 2.85 people, more than the U.S. average of 2.65. Household size has dropped from 2.99 in 2006–10, a much bigger shift than nationally. Households are largest in the northeast and smallest in the west.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 40.0 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 42.4 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 43.5 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 48.2 | 39.2 | 40.6 | 40.1 |
| Change | +8.2 | +2.2 | +2.1 | +2.3 |
ZIP 20721 skews older: half of its residents are older than 48.2, well above the national median of 40.1. That usually means more empty nesters and retirees, and fewer young families. The median age has climbed from 40.0 in 2006–10, a much bigger shift than nationally. Of the 240 Maryland ZIP codes with 5,000+ people, only eight are older.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.0% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 12.4% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 11.1% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 9.5% | 10.4% | 11.7% | 11.6% |
| Change | −1.5 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single-parent households are less common in ZIP 20721 than nationally: 9.5%, against 11.6%. The picture is much the same across the Washington area. Since 2006–10, the single-parent share has fallen 1.5 points, as it has 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 ZIP 20721
Renters in ZIP 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.7% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 12.6% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 12.1% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 10.9% | 36.3% | 32.4% | 34.8% |
| Change | +0.3 pts | +2.3 pts | +1.4 pts | +1.5 pts |
Only 10.9% of households in ZIP 20721 rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Nearly one in eight owners (11.9%) have paid off their mortgages, well below the national share of 39.8%. Renting is most common in the south and least common in the northeast.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.6% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 5.6% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 5.9% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 3.1% | 5.9% | 7.1% | 9.6% |
| Change | −3.4 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Empty homes are scarce in ZIP 20721: just 3.1% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. Since 2006–10, vacancy has fallen 3.4 points, in line with the national trend. ZIP 20721 has a lower vacancy rate than at least four in five Maryland ZIP codes.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1992 | 1977 | 1974 | 1974 |
| 2010–14 | 1992 | 1978 | 1975 | 1975 |
| 2015–19 | 1994 | 1979 | 1976 | 1977 |
| 2020–24 | 1996 | 1982 | 1978 | 1980 |
| Change | +4 | +6 | +4 | +6 |
Much of the housing in ZIP 20721 is relatively new: half of its homes were built after 1996, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1992 in 2006–10, a sign of steady new building. The newest homes are mostly in the northeast, the oldest in the south.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,945 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,965 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $2,517 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,700 | $2,236 | $1,869 | $1,571 |
| Change | +$755 | +$766 | +$620 | +$606 |
The median renter in ZIP 20721 pays $2,700 a month for rent and utilities, well above the national median of $1,571. Rents are up $755 a month from 2006–10, a 39% rise, a slower climb than the nation's. The typical renter here spends 30.9% of household income on rent, just over the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the north; the highest are in the southeast.
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 20721
Bachelor's degrees in ZIP 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 56.7% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 53.3% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 54.8% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 57.4% | 53.9% | 43.4% | 35.6% |
| Change | +0.7 pts | +7.3 pts | +7.1 pts | +7.2 pts |
ZIP 20721 is highly educated: nearly six in ten adults 25 and older (57.4%) hold at least a bachelor's degree, far above the national share of 35.6%. The share with a degree has edged up 0.7 points since 2006–10, a smaller shift than nationally. College graduates are most concentrated in the northeast and least in the south.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 96.7% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 97.0% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 95.9% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 96.4% | 91.2% | 90.9% | 89.3% |
| Change | −0.2 pts | +1.7 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 20721: 96.4% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. ZIP 20721 has a higher share of high school graduates than the great majority of Maryland ZIP codes.
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 20721
| Period | ZIP 20721 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.4% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 9.4% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 5.2% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 5.6% | 4.8% | 5.0% | 5.4% |
| Change | +1.2 pts | −1.1 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 20721 is close to the national rate: 5.6% of the labor force, against 5.4%. The rate is higher than in the Washington area overall (4.8%). Unemployment has edged up 1.2 points since 2006–10, even as the national rate fell.
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 20721 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 20721 | 2.85 | 48.2 | 9.5% | 10.9% | 3.1% | 1996 | $2,700 | 57.4% | 96.4% | 5.6% |
| ZIP 20774 | 2.63 | 43.5 | 15.3% | 23.3% | 3.8% | 1996 | $2,261 | 48.0% | 94.5% | 6.4% |
| ZIP 20720 | 3.08 | 42.4 | 14.2% | 8.4% | 3.6% | 1997 | $2,634 | 59.1% | 95.6% | 3.6% |
| ZIP 20716 | 2.38 | 42.4 | 13.0% | 30.4% | 3.7% | 1986 | $2,303 | 48.7% | 93.3% | 5.3% |
| ZIP 20769 | 2.98 | 43.4 | 10.5% | 10.9% | 6.7% | 1998 | $1,618 | 51.0% | 91.8% | 7.9% |
| ZIP 20785 | 2.70 | 37.4 | 18.2% | 47.9% | 5.9% | 1975 | $1,992 | 29.3% | 86.6% | 6.5% |
| ZIP 20706 | 3.33 | 38.6 | 16.5% | 28.5% | 6.3% | 1975 | $1,914 | 33.4% | 82.0% | 5.1% |
| ZIP 20784 | 3.31 | 35.4 | 15.0% | 45.5% | 3.7% | 1963 | $1,963 | 22.1% | 76.4% | 6.7% |
| ZIP 20715 | 2.83 | 40.4 | 10.4% | 9.7% | 4.7% | 1971 | $2,551 | 49.8% | 94.4% | 5.0% |
| ZIP 20743 | 2.71 | 38.6 | 17.6% | 34.2% | 5.8% | 1971 | $1,667 | 24.7% | 84.9% | 10.8% |
| ZIP 20771 | 2.91 | 29.8 | 36.6% | 65.6% | 11.6% | 1977 | $1,986 | 31.2% | 98.7% | 9.1% |
All figures 2020–24.
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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 20721. 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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