Population 39,847 · Census ACS 2020–24
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Population and households in ZIP 21804
Household size in ZIP 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.53 | 2.68 | 2.68 |
| 2010–14 | 2.61 | 2.73 | 2.73 |
| 2015–19 | 2.60 | 2.74 | 2.71 |
| 2020–24 | 2.54 | 2.68 | 2.65 |
| Change | +0.01 | +0.01 | −0.03 |
Households in ZIP 21804 run a little small, averaging 2.54 people against 2.65 nationally, which usually means more singles and couples and fewer children. The biggest households, usually families with children, are concentrated 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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 36.6 | 38.5 | 37.7 |
| 2010–14 | 36.1 | 39.3 | 38.6 |
| 2015–19 | 37.2 | 40.2 | 39.6 |
| 2020–24 | 35.7 | 40.6 | 40.1 |
| Change | −0.9 | +2.1 | +2.3 |
ZIP 21804 is young: half of its residents are under 35.7, compared with a national median of 40.1. The population tilts toward young adults, many of them living alone or as couples. The median age has dropped from 36.6 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 ZIP 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 15.2% | 12.5% | 12.3% |
| 2010–14 | 14.9% | 12.6% | 12.3% |
| 2015–19 | 16.0% | 11.7% | 11.6% |
| 2020–24 | 13.2% | 11.7% | 11.6% |
| Change | −1.9 pts | −0.9 pts | −0.6 pts |
Single-parent households are a bit more common in ZIP 21804 than nationally: 13.2%, against 11.6%. Since 2006–10, the single-parent share has fallen 1.9 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 ZIP 21804
Renters in ZIP 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 42.1% | 31.0% | 33.3% |
| 2010–14 | 44.6% | 32.9% | 35.6% |
| 2015–19 | 52.4% | 33.1% | 36.0% |
| 2020–24 | 50.0% | 32.4% | 34.8% |
| Change | +7.9 pts | +1.4 pts | +1.5 pts |
Renting is far more common in ZIP 21804 than nationally: 50.0% of households rent their homes, against 34.8%. Among homeowners, 37.9% have no mortgage at all, about the same as nationally. Rentals cluster in the north; owners are most common in the southeast. Since 2006–10, the renter share has risen 7.9 points, a much bigger shift than nationally.
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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 11.4% | 9.0% | 11.4% |
| 2010–14 | 12.9% | 8.9% | 11.4% |
| 2015–19 | 10.0% | 8.9% | 11.1% |
| 2020–24 | 8.7% | 7.1% | 9.6% |
| Change | −2.7 pts | −1.9 pts | −1.8 pts |
About as many homes sit empty in ZIP 21804 as nationally: 8.7%, against 9.6%. The rate is higher than in Maryland as a whole (7.1%). Since 2006–10, vacancy has fallen 2.7 points, as it has 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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1979 | 1974 | 1974 |
| 2010–14 | 1980 | 1975 | 1975 |
| 2015–19 | 1980 | 1976 | 1977 |
| 2020–24 | 1983 | 1978 | 1980 |
| Change | +4 | +4 | +6 |
Homes in ZIP 21804 are about the same age as the nation's housing: the median home was built in 1983, versus 1980 nationally. Homes here are newer than in Maryland overall, where the median home dates to 1978. The median year built has moved up from 1979 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northeast, while the west has the oldest housing.
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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $1,021 | $1,249 | $965 |
| 2010–14 | $1,074 | $1,363 | $1,040 |
| 2015–19 | $1,159 | $1,576 | $1,213 |
| 2020–24 | $1,422 | $1,869 | $1,571 |
| Change | +$400 | +$620 | +$606 |
Rent in ZIP 21804 runs $1,422 a month at the median, utilities included, below the U.S. median of $1,571. Rent has climbed $400 a month since 2006–10, up 39%, a slower climb than the nation's. The typical renter here spends 30.2% of household income on rent, just over 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 ZIP 21804
Bachelor's degrees in ZIP 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 24.8% | 36.3% | 28.4% |
| 2010–14 | 29.0% | 37.7% | 29.6% |
| 2015–19 | 25.9% | 40.5% | 32.1% |
| 2020–24 | 27.0% | 43.4% | 35.6% |
| Change | +2.2 pts | +7.1 pts | +7.2 pts |
More than a quarter of adults 25 and older in ZIP 21804 (27.0%) have a bachelor's degree or higher, below the national share of 35.6%. The share with a degree has risen 2.2 points since 2006–10, a smaller shift than nationally. College graduates are most concentrated in the southeast and least in the west.
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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 84.5% | 88.0% | 84.9% |
| 2010–14 | 89.0% | 89.1% | 86.1% |
| 2015–19 | 86.7% | 90.2% | 87.7% |
| 2020–24 | 90.3% | 90.9% | 89.3% |
| Change | +5.8 pts | +2.9 pts | +4.3 pts |
High school completion in ZIP 21804 is close to the national rate: 90.3% of adults have a diploma or equivalent, against 89.3%. The share with a diploma has risen 5.8 points since 2006–10, mirroring the country.
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 21804
| Period | ZIP 21804 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.7% | 6.5% | 8.1% |
| 2010–14 | 8.0% | 8.1% | 9.4% |
| 2015–19 | 6.9% | 5.1% | 5.6% |
| 2020–24 | 7.1% | 5.0% | 5.4% |
| Change | −1.6 pts | −1.5 pts | −2.7 pts |
Unemployment runs high in ZIP 21804: 7.1% of the labor force was out of work and looking, against 5.4% nationally. Since 2006–10, unemployment has fallen 1.6 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 21804 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 21804 | 2.54 | 35.7 | 13.2% | 50.0% | 8.7% | 1983 | $1,422 | 27.0% | 90.3% | 7.1% |
| ZIP 21802 | 2.27 | 21.3 | 7.2% | 89.9% | 8.2% | 1995 | $1,087 | 22.0% | 93.8% | 17.0% |
| ZIP 21801 | 2.40 | 37.4 | 11.9% | 42.4% | 8.7% | 1978 | $1,246 | 33.6% | 89.4% | 5.7% |
| ZIP 21826 | 3.11 | 31.1 | 11.0% | 27.7% | 10.7% | 1980 | $1,455 | 36.1% | 90.2% | 4.0% |
| ZIP 21849 | 2.50 | 39.5 | 14.3% | 20.5% | 6.6% | 1978 | $1,368 | 23.8% | 90.6% | 2.3% |
| ZIP 21875 | 2.59 | 38.2 | 12.1% | 27.4% | 8.9% | 1988 | $1,442 | 23.2% | 92.2% | 2.2% |
| ZIP 21822 | 2.72 | 42.7 | 8.9% | 15.0% | 12.2% | 1991 | $1,185 | 32.4% | 94.7% | 9.6% |
| ZIP 21830 | 2.82 | 38.0 | 14.0% | 14.4% | 5.8% | 1991 | $1,372 | 38.8% | 93.8% | 5.1% |
| ZIP 21810 | 2.23 | 56.5 | 2.5% | 4.6% | 1.9% | 1991 | $1,199 | 49.5% | 96.2% | 3.4% |
| ZIP 19940 | 3.00 | 45.6 | 9.9% | 15.1% | 9.0% | 1994 | $1,119 | 19.2% | 87.2% | 6.1% |
| ZIP 21850 | 2.35 | 43.9 | 16.6% | 10.6% | 8.3% | 1995 | $1,106 | 16.1% | 89.8% | 3.5% |
All figures 2020–24.
Zip codes with similar populations: 77024, TX · 16001, PA · 17042, PA · 95691, CA · 92543, CA · 60543, IL · 44118, OH · 90605, CA · 90036, CA · 84037, UT
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 21804. 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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