Population 269 · Census ACS 2020–24
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Population and households in ZIP 21790
Household size in ZIP 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.36 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.53 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 2.53 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 2.73 | 2.77 | 2.68 | 2.65 |
| Change | +0.37 | +0.04 | +0.01 | −0.03 |
The typical household in ZIP 21790 holds 2.73 people, slightly more than the U.S. average of 2.65. That is in line with the rest of the Washington area. Household size has climbed from 2.36 in 2006–10, but in a place this small, survey estimates can swing a lot from one release to the next.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 50.5 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 47.2 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 47.6 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 49.1 | 39.2 | 40.6 | 40.1 |
| Change | −1.4 | +2.2 | +2.1 | +2.3 |
With a median age of 49.1, ZIP 21790 is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.8% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 5.2% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 7.5% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 5.0% | 10.4% | 11.7% | 11.6% |
| Change | −0.8 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head only 5.0% of households in ZIP 21790, well below the national share of 11.6%.
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 21790
Renters in ZIP 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.0% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 32.1% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 30.2% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 19.4% | 36.3% | 32.4% | 34.8% |
| Change | −15.6 pts | +2.3 pts | +1.4 pts | +1.5 pts |
ZIP 21790 is largely a place of homeowners: only 19.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. About one in six owners (17.2%) have paid off their mortgages, well below the national share of 39.8%.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.5% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 4.9% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 3.0% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 5.4% | 5.9% | 7.1% | 9.6% |
| Change | +2.0 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Only 5.4% of homes in ZIP 21790 are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. The Washington area as a whole looks much the same.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1989 | 1977 | 1974 | 1974 |
| 2010–14 | 1993 | 1978 | 1975 | 1975 |
| 2015–19 | 1992 | 1979 | 1976 | 1977 |
| 2020–24 | 1998 | 1982 | 1978 | 1980 |
| Change | +9 | +6 | +4 | +6 |
ZIP 21790 has newer housing than the country as a whole: the median home was built in 1998, versus 1980 nationally.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,882 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,239 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,051 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,172 | $2,236 | $1,869 | $1,571 |
| Change | +$289 | +$766 | +$620 | +$606 |
A typical rental in ZIP 21790 costs $2,172 a month with utilities, well above the national median of $1,571. The picture is much the same across the Washington area. Rent takes 37.4% 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 21790
Bachelor's degrees in ZIP 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 44.7% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 38.9% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 49.3% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 45.2% | 53.9% | 43.4% | 35.6% |
| Change | +0.5 pts | +7.3 pts | +7.1 pts | +7.2 pts |
More than four in ten adults 25 and older in ZIP 21790 (45.2%) have a bachelor's degree or higher, above the national share of 35.6%. Locally, though, the share is lower than in the Washington area as a whole (53.9%).
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.1% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 89.4% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 92.0% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 92.6% | 91.2% | 90.9% | 89.3% |
| Change | −1.4 pts | +1.7 pts | +2.9 pts | +4.3 pts |
About nine in ten adults in ZIP 21790 have finished high school (92.6%), above the national rate of 89.3%. That is in line with the rest of the Washington area.
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 21790
| Period | ZIP 21790 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.5% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 5.5% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 1.9% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 3.7% | 4.8% | 5.0% | 5.4% |
| Change | +0.2 pts | −1.1 pts | −1.5 pts | −2.7 pts |
Jobs have been easier to find in ZIP 21790 than nationally: unemployment was 3.7%, against 5.4%. 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 21790 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 21790 | 2.73 | 49.1 | 5.0% | 19.4% | 5.4% | 1998 | $2,172 | 45.2% | 92.6% | 3.7% |
| 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 20842 | 2.91 | 44.3 | 7.0% | 14.8% | 6.9% | 1987 | $1,996 | 59.5% | 93.9% | 0.9% |
| ZIP 21755 | 2.93 | 43.5 | 4.8% | 13.5% | 6.8% | 1989 | $1,332 | 46.7% | 95.3% | 3.1% |
| ZIP 20838 | 2.76 | 44.1 | 8.6% | 15.0% | 1.4% | 1975 | $1,672 | 60.5% | 94.5% | 0.2% |
| ZIP 20839 | 3.15 | 42.3 | 8.5% | 12.8% | 5.4% | 1996 | $2,789 | 61.4% | 92.5% | 2.0% |
| ZIP 21716 | 2.51 | 40.4 | 5.1% | 15.3% | 6.7% | 1981 | $1,152 | 33.3% | 92.9% | 5.0% |
| ZIP 20180 | 3.05 | 43.3 | 6.4% | 4.9% | 6.9% | 1997 | $2,081 | 54.8% | 93.7% | 4.9% |
| ZIP 21703 | 2.78 | 35.6 | 17.7% | 33.5% | 5.0% | 1999 | $2,150 | 43.6% | 92.5% | 2.7% |
All figures 2020–24.
Zip codes with similar populations: 80476, CO · 56166, MN · 56434, MN · 56516, MN · 56553, MN · 57021, SD · 57047, SD · 81220, CO · 81210, CO · 81024, CO
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 21790. 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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