Population 24,386 · Census ACS 2020–24
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Population and households in ZIP 21811
Household size in ZIP 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.31 | 2.68 | 2.68 |
| 2010–14 | 2.39 | 2.73 | 2.73 |
| 2015–19 | 2.33 | 2.74 | 2.71 |
| 2020–24 | 2.29 | 2.68 | 2.65 |
| Change | −0.02 | +0.01 | −0.03 |
Households in ZIP 21811 are small: just 2.29 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Only 17 of the 240 Maryland ZIP codes with 5,000+ people have smaller households.
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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 50.2 | 38.5 | 37.7 |
| 2010–14 | 51.6 | 39.3 | 38.6 |
| 2015–19 | 52.3 | 40.2 | 39.6 |
| 2020–24 | 53.6 | 40.6 | 40.1 |
| Change | +3.5 | +2.1 | +2.3 |
ZIP 21811 skews older: half of its residents are older than 53.6, 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 50.2 in 2006–10, as it has nationally. No other Maryland ZIP code with 5,000+ people is 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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 9.1% | 12.5% | 12.3% |
| 2010–14 | 7.6% | 12.6% | 12.3% |
| 2015–19 | 8.5% | 11.7% | 11.6% |
| 2020–24 | 10.5% | 11.7% | 11.6% |
| Change | +1.4 pts | −0.9 pts | −0.6 pts |
Single parents head about one in ten households in ZIP 21811 (10.5%), a little below the national share of 11.6%. The single-parent share has edged up 1.4 points since 2006–10, 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 21811
Renters in ZIP 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 19.3% | 31.0% | 33.3% |
| 2010–14 | 18.8% | 32.9% | 35.6% |
| 2015–19 | 20.6% | 33.1% | 36.0% |
| 2020–24 | 16.9% | 32.4% | 34.8% |
| Change | −2.4 pts | +1.4 pts | +1.5 pts |
ZIP 21811 is largely a place of homeowners: only 16.9% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 38.5% have no mortgage at all, about the same as nationally. Since 2006–10, the renter share has fallen 2.4 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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 30.6% | 9.0% | 11.4% |
| 2010–14 | 37.1% | 8.9% | 11.4% |
| 2015–19 | 30.0% | 8.9% | 11.1% |
| 2020–24 | 26.8% | 7.1% | 9.6% |
| Change | −3.9 pts | −1.9 pts | −1.8 pts |
Vacant homes make up 26.8% of the housing in ZIP 21811, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand. Vacancy is down 3.9 points from 2006–10, in line with the national trend.
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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1986 | 1974 | 1974 |
| 2010–14 | 1989 | 1975 | 1975 |
| 2015–19 | 1989 | 1976 | 1977 |
| 2020–24 | 1992 | 1978 | 1980 |
| Change | +6 | +4 | +6 |
Much of the housing in ZIP 21811 is relatively new: half of its homes were built after 1992, compared with 1980 for the U.S. as a whole. The median year built has moved up from 1986 in 2006–10, a sign of steady new building. Newer construction is concentrated in the east, 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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $1,139 | $1,249 | $965 |
| 2010–14 | $1,245 | $1,363 | $1,040 |
| 2015–19 | $1,427 | $1,576 | $1,213 |
| 2020–24 | $1,615 | $1,869 | $1,571 |
| Change | +$476 | +$620 | +$606 |
A typical rental in ZIP 21811 costs $1,615 a month with utilities, close to the national median of $1,571. Rents here are lower than in Maryland overall ($1,869). Rents are up $476 a month from 2006–10, a 42% rise, a slower climb than the nation's. The typical renter here spends 34.6% of household income on rent, 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 21811
Bachelor's degrees in ZIP 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 28.3% | 36.3% | 28.4% |
| 2010–14 | 31.3% | 37.7% | 29.6% |
| 2015–19 | 32.8% | 40.5% | 32.1% |
| 2020–24 | 40.7% | 43.4% | 35.6% |
| Change | +12.3 pts | +7.1 pts | +7.2 pts |
College degrees are a bit more common in ZIP 21811 than nationally: 40.7% of adults 25 and older have a bachelor's or higher, against 35.6%. Maryland as a whole looks much the same. The share with a degree has risen 12.3 points since 2006–10, 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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 90.1% | 88.0% | 84.9% |
| 2010–14 | 90.5% | 89.1% | 86.1% |
| 2015–19 | 93.5% | 90.2% | 87.7% |
| 2020–24 | 94.3% | 90.9% | 89.3% |
| Change | +4.2 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 21811: 94.3% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma has risen 4.2 points since 2006–10, as it has 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 21811
| Period | ZIP 21811 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 7.7% | 6.5% | 8.1% |
| 2010–14 | 8.1% | 8.1% | 9.4% |
| 2015–19 | 3.8% | 5.1% | 5.6% |
| 2020–24 | 5.8% | 5.0% | 5.4% |
| Change | −1.9 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 21811 is close to the national rate: 5.8% of the labor force, against 5.4%. The rate is higher than in Maryland as a whole (5.0%). Unemployment has fallen 1.9 points since 2006–10, in line with the national trend.
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 21811 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 21811 | 2.29 | 53.6 | 10.5% | 16.9% | 26.8% | 1992 | $1,615 | 40.7% | 94.3% | 5.8% |
| ZIP 21862 | 2.29 | 47.0 | 4.8% | 4.7% | 16.1% | 1991 | $1,125 | 35.4% | 87.6% | 0.0% |
| ZIP 21813 | 2.35 | 51.9 | 5.1% | 18.1% | 15.4% | 1992 | $1,151 | 26.5% | 93.5% | 4.3% |
| ZIP 21842 | 2.04 | 48.6 | 7.1% | 23.8% | 60.3% | 1988 | $1,432 | 41.2% | 94.3% | 7.4% |
| ZIP 21872 | 2.22 | 49.1 | 5.6% | 13.9% | 22.0% | 1991 | $1,125 | 36.4% | 87.6% | 0.6% |
| ZIP 19975 | 2.22 | 58.0 | 6.3% | 10.6% | 31.1% | 2000 | $1,127 | 36.7% | 91.3% | 5.6% |
| ZIP 21841 | 2.18 | 50.1 | 7.8% | 23.7% | 12.5% | 1983 | $1,652 | 16.0% | 96.4% | 3.9% |
| ZIP 19944 | 2.13 | 69.1 | 0.4% | 8.8% | 80.3% | 1986 | $1,386 | 56.2% | 87.9% | 3.2% |
| ZIP 21874 | 2.62 | 43.8 | 19.1% | 16.8% | 9.6% | 1985 | $1,383 | 21.4% | 89.4% | 7.5% |
| ZIP 21850 | 2.35 | 43.9 | 16.6% | 10.6% | 8.3% | 1995 | $1,106 | 16.1% | 89.8% | 3.5% |
| ZIP 21849 | 2.50 | 39.5 | 14.3% | 20.5% | 6.6% | 1978 | $1,368 | 23.8% | 90.6% | 2.3% |
All figures 2020–24.
Zip codes with similar populations: 33772, FL · 70510, LA · 66106, KS · 72206, AR · 60002, IL · 55430, MN · 49316, MI · 77054, TX · 48329, MI · 48083, MI
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 21811. 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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