Population 6,128 · Census ACS 2020–24
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Population and households in ZIP 21755
Household size in ZIP 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.60 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.65 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 2.73 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 2.93 | 2.77 | 2.68 | 2.65 |
| Change | +0.33 | +0.04 | +0.01 | −0.03 |
Households in ZIP 21755 are large by national standards, averaging 2.93 people against 2.65 for the U.S. That usually means more families with children at home. Household size has climbed from 2.60 in 2006–10, 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 ZIP 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 44.6 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 45.4 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 46.5 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 43.5 | 39.2 | 40.6 | 40.1 |
| Change | −1.1 | +2.2 | +2.1 | +2.3 |
The median resident of ZIP 21755 is 43.5 years old, older than the national median of 40.1. Since 2006–10, the median age has dropped from 44.6, even as the national median rose. The youngest areas are in the east, the oldest in the south.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.8% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 7.3% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 4.0% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 4.8% | 10.4% | 11.7% | 11.6% |
| Change | −4.0 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head only 4.8% of households in ZIP 21755, well below the national share of 11.6%. The single-parent share has fallen 4.0 points since 2006–10, a much bigger shift than nationally. Only 15 of the 240 Maryland ZIP codes with 5,000+ people 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 21755
Renters in ZIP 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 14.4% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 13.3% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 9.6% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 13.5% | 36.3% | 32.4% | 34.8% |
| Change | −0.9 pts | +2.3 pts | +1.4 pts | +1.5 pts |
ZIP 21755 is overwhelmingly a place of homeowners: only 13.5% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 25.4% have no mortgage at all, well below the national share of 39.8%. Since 2006–10, the renter share has edged down 0.9 points, even as the national share rose.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.9% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 2.8% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 2.5% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 6.8% | 5.9% | 7.1% | 9.6% |
| Change | −1.2 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21755: 6.8% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. The picture is much the same across the Washington area. Since 2006–10, vacancy has edged down 1.2 points, mirroring the country.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1984 | 1977 | 1974 | 1974 |
| 2010–14 | 1986 | 1978 | 1975 | 1975 |
| 2015–19 | 1986 | 1979 | 1976 | 1977 |
| 2020–24 | 1989 | 1982 | 1978 | 1980 |
| Change | +5 | +6 | +4 | +6 |
ZIP 21755 has newer housing than the country as a whole: the median home was built in 1989, versus 1980 nationally. The median year built has moved up from 1984 in 2006–10, a sign of steady new building. The newest homes are mostly in the east, the oldest in the northwest.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $802 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,059 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,084 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $1,332 | $2,236 | $1,869 | $1,571 |
| Change | +$530 | +$766 | +$620 | +$606 |
A typical rental in ZIP 21755 costs $1,332 a month with utilities, below the national median of $1,571. Rent has climbed $530 a month since 2006–10, up 66%, faster than rents rose nationally. The typical renter here spends 24.2% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Renters on a budget will find the lowest rents in the center; 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 21755
Bachelor's degrees in ZIP 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.9% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 38.2% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 39.1% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 46.7% | 53.9% | 43.4% | 35.6% |
| Change | +10.8 pts | +7.3 pts | +7.1 pts | +7.2 pts |
ZIP 21755 is highly educated: nearly half of adults 25 and older (46.7%) hold at least a bachelor's degree, far above the national share of 35.6%. Locally, though, the share is lower than in the Washington area as a whole (53.9%). Since 2006–10, the share with a degree has risen 10.8 points, in line with the national trend.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 95.4% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 96.6% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 95.1% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 95.3% | 91.2% | 90.9% | 89.3% |
| Change | −0.1 pts | +1.7 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 21755: 95.3% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Compared with other Maryland ZIP codes, ZIP 21755 has a higher share of high school graduates than most.
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 21755
| Period | ZIP 21755 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.1% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 4.4% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 4.6% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 3.1% | 4.8% | 5.0% | 5.4% |
| Change | +1.0 pts | −1.1 pts | −1.5 pts | −2.7 pts |
The job market in ZIP 21755 has been strong: just 3.1% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment is up 1.0 points from 2006–10, even as the national rate fell. 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).
ZIP 21755 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 21755 | 2.93 | 43.5 | 4.8% | 13.5% | 6.8% | 1989 | $1,332 | 46.7% | 95.3% | 3.1% |
| ZIP 21714 | 2.16 | 52.3 | 4.2% | 35.9% | 10.4% | 1968 | $1,774 | 42.0% | 100.0% | 0.0% |
| ZIP 21718 | 2.72 | 55.8 | 6.1% | 13.2% | 11.8% | 1974 | $2,351 | 41.7% | 97.0% | 12.3% |
| ZIP 21716 | 2.51 | 40.4 | 5.1% | 15.3% | 6.7% | 1981 | $1,152 | 33.3% | 92.9% | 5.0% |
| ZIP 21769 | 2.94 | 45.2 | 7.7% | 12.0% | 5.5% | 1984 | $1,982 | 48.1% | 97.1% | 3.1% |
| ZIP 21758 | 2.81 | 40.5 | 6.2% | 14.3% | 3.1% | 1992 | $1,563 | 47.6% | 95.4% | 5.2% |
| ZIP 21703 | 2.78 | 35.6 | 17.7% | 33.5% | 5.0% | 1999 | $2,150 | 43.6% | 92.5% | 2.7% |
| ZIP 21777 | 2.94 | 43.4 | 5.5% | 7.5% | 3.9% | 1997 | $2,068 | 44.3% | 94.7% | 3.9% |
| ZIP 21710 | 2.81 | 49.9 | 2.9% | 16.0% | 6.3% | 1995 | $2,230 | 51.0% | 93.0% | 1.2% |
| ZIP 21717 | 2.62 | 49.5 | 2.4% | 8.9% | 6.1% | 1982 | $2,298 | 33.6% | 96.8% | 0.0% |
| ZIP 21790 | 2.73 | 49.1 | 5.0% | 19.4% | 5.4% | 1998 | $2,172 | 45.2% | 92.6% | 3.7% |
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 21755. 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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