Population 5,407 · Census ACS 2020–24
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Population and households in ZIP 21791
Household size in ZIP 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.71 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.73 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 2.60 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 2.66 | 2.77 | 2.68 | 2.65 |
| Change | −0.06 | +0.04 | +0.01 | −0.03 |
At 2.66 people per household, ZIP 21791 sits close to the national average of 2.65. The typical household here is smaller than in the wider Washington area, where it has 2.77 people. Household size has edged down from 2.71 in 2006–10, in line with the national trend.
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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 43.1 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 42.2 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 45.8 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 43.8 | 39.2 | 40.6 | 40.1 |
| Change | +0.6 | +2.2 | +2.1 | +2.3 |
The median resident of ZIP 21791 is 43.8 years old, older than the national median of 40.1. Since 2006–10, the median age has crept up from 43.1, a smaller shift than nationally. The youngest areas are in the north, the oldest in the west.
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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.1% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 13.4% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 9.8% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 7.9% | 10.4% | 11.7% | 11.6% |
| Change | +1.8 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single-parent households are relatively rare in ZIP 21791: 7.9% of households, against 11.6% nationally. Since 2006–10, the single-parent share has risen 1.8 points, even as the national share fell.
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 21791
Renters in ZIP 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 16.1% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 20.5% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 26.0% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 15.4% | 36.3% | 32.4% | 34.8% |
| Change | −0.7 pts | +2.3 pts | +1.4 pts | +1.5 pts |
ZIP 21791 is largely a place of homeowners: only 15.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 27.0% have no mortgage at all, well below the national share of 39.8%. Since 2006–10, the renter share has edged down 0.7 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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 11.2% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 6.3% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 5.7% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 5.5% | 5.9% | 7.1% | 9.6% |
| Change | −5.7 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Empty homes are scarce in ZIP 21791: just 5.5% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. The picture is much the same across the Washington area. Vacancy is down 5.7 points from 2006–10, a much bigger shift than nationally.
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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1968 | 1977 | 1974 | 1974 |
| 2010–14 | 1970 | 1978 | 1975 | 1975 |
| 2015–19 | 1966 | 1979 | 1976 | 1977 |
| 2020–24 | 1964 | 1982 | 1978 | 1980 |
| Change | −4 | +6 | +4 | +6 |
The housing in ZIP 21791 is old by national standards: the median home dates to 1964, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. Newer construction is concentrated in the southeast, while the north has the oldest housing. ZIP 21791 has older homes than at least four in five Maryland ZIP codes.
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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $965 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,087 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,223 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $1,626 | $2,236 | $1,869 | $1,571 |
| Change | +$661 | +$766 | +$620 | +$606 |
Rent in ZIP 21791 runs $1,626 a month at the median, utilities included, close to the U.S. median of $1,571. Rents here are lower than in the Washington area as a whole ($2,236). Rents are up $661 a month from 2006–10, a 68% jump, faster than rents rose nationally. Rent takes 36.9% 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 ZIP 21791
Bachelor's degrees in ZIP 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 23.4% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 23.7% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 25.2% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 29.5% | 53.9% | 43.4% | 35.6% |
| Change | +6.0 pts | +7.3 pts | +7.1 pts | +7.2 pts |
About three in ten adults 25 and older in ZIP 21791 (29.5%) have a bachelor's degree or higher, a little below the national share of 35.6%. The share with a degree is up 6.0 points from 2006–10, as it has nationally. College graduates are most concentrated in the southwest and least in the center.
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 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 91.6% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 91.7% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 90.9% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 92.4% | 91.2% | 90.9% | 89.3% |
| Change | +0.8 pts | +1.7 pts | +2.9 pts | +4.3 pts |
About nine in ten adults in ZIP 21791 have finished high school (92.4%), a bit above the national rate of 89.3%. The picture is much the same across the Washington area. The share with a diploma has edged up 0.8 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 ZIP 21791
| Period | ZIP 21791 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.3% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 6.9% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 3.7% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 2.6% | 4.8% | 5.0% | 5.4% |
| Change | −4.7 pts | −1.1 pts | −1.5 pts | −2.7 pts |
The job market in ZIP 21791 has been strong: just 2.6% of the labor force was out of work and looking, well below the national rate of 5.4%. Since 2006–10, unemployment has fallen 4.7 points, as it has nationally. 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 21791 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 21791 | 2.66 | 43.8 | 7.9% | 15.4% | 5.5% | 1964 | $1,626 | 29.5% | 92.4% | 2.6% |
| ZIP 21757 | 2.95 | 40.9 | 7.0% | 19.4% | 9.3% | 1969 | $1,533 | 30.4% | 90.1% | 3.0% |
| ZIP 21776 | 2.58 | 44.6 | 4.2% | 10.1% | 3.3% | 1978 | $1,476 | 39.2% | 96.5% | 6.7% |
| ZIP 21762 | 3.15 | 39.6 | 23.7% | 2.5% | 5.6% | 1975 | $2,380 | 47.2% | 98.6% | 1.7% |
| ZIP 21798 | 2.94 | 45.9 | 10.4% | 16.9% | 12.1% | 1985 | $1,278 | 42.0% | 93.4% | 4.1% |
| ZIP 21787 | 2.65 | 42.7 | 12.1% | 21.4% | 5.5% | 1984 | $1,151 | 22.0% | 94.4% | 4.2% |
| ZIP 21778 | 2.32 | 49.7 | 3.3% | 12.2% | 9.8% | 1973 | $1,576 | 30.2% | 85.5% | 3.4% |
| ZIP 21793 | 2.73 | 42.2 | 7.2% | 12.5% | 4.3% | 1979 | $1,599 | 39.7% | 94.8% | 2.2% |
| ZIP 21158 | 2.70 | 41.9 | 9.5% | 21.1% | 5.1% | 1983 | $1,722 | 36.2% | 94.2% | 3.6% |
| ZIP 21157 | 2.51 | 42.5 | 7.9% | 22.8% | 5.0% | 1975 | $1,440 | 36.9% | 93.8% | 4.7% |
| ZIP 21774 | 3.04 | 35.9 | 6.0% | 6.8% | 3.2% | 2002 | $2,182 | 61.3% | 97.0% | 2.3% |
All figures 2020–24.
Zip codes with similar populations: 38860, MS · 35470, AL · 35490, AL · 35581, AL · 35760, AL · 35980, AL · 37098, TN · 37302, TN · 37665, TN · 35186, AL
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 21791. 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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