Population 132 · Census ACS 2020–24
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Population and households in ZIP 21718
Household size in ZIP 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.81 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.74 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 2.68 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 2.72 | 2.77 | 2.68 | 2.65 |
| Change | −0.10 | +0.04 | +0.01 | −0.03 |
Households in ZIP 21718 average 2.72 people, about the same as the country as a whole (2.65). Since 2006–10, household size has dropped from 2.81, 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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 47.0 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 45.0 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 46.1 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 55.8 | 39.2 | 40.6 | 40.1 |
| Change | +8.8 | +2.2 | +2.1 | +2.3 |
With a median age of 55.8, ZIP 21718 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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.8% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 4.6% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 9.3% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 6.1% | 10.4% | 11.7% | 11.6% |
| Change | +3.3 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head only 6.1% of households in ZIP 21718, 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 21718
Renters in ZIP 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.0% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 20.8% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 11.3% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 13.2% | 36.3% | 32.4% | 34.8% |
| Change | +5.2 pts | +2.3 pts | +1.4 pts | +1.5 pts |
ZIP 21718 is overwhelmingly a place of homeowners: only 13.2% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 64.8% have no mortgage at all, well above 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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.2% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 1.9% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 6.6% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 11.8% | 5.9% | 7.1% | 9.6% |
| Change | +3.6 pts | −2.8 pts | −1.9 pts | −1.8 pts |
A few more homes sit empty in ZIP 21718 than nationally: 11.8%, against 9.6%. The count includes vacation homes and homes between owners or tenants, not just abandoned ones.
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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1958 | 1977 | 1974 | 1974 |
| 2010–14 | 1973 | 1978 | 1975 | 1975 |
| 2015–19 | 1975 | 1979 | 1976 | 1977 |
| 2020–24 | 1974 | 1982 | 1978 | 1980 |
| Change | +16 | +6 | +4 | +6 |
Homes in ZIP 21718 run a bit older than the national norm, with a median build year of 1974 against 1980.
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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $721 | $1,470 | $1,249 | $965 |
| 2010–14 | $949 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,366 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,351 | $2,236 | $1,869 | $1,571 |
| Change | +$1,630 | +$766 | +$620 | +$606 |
A typical rental in ZIP 21718 costs $2,351 a month with utilities, well above the national median of $1,571. Rent takes 21.3% of the typical renter's income, comfortably under 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 21718
Bachelor's degrees in ZIP 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 33.8% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 27.1% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 27.4% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 41.7% | 53.9% | 43.4% | 35.6% |
| Change | +7.9 pts | +7.3 pts | +7.1 pts | +7.2 pts |
College degrees are a bit more common in ZIP 21718 than nationally: 41.7% of adults 25 and older have a bachelor's or higher, against 35.6%. Locally, though, the share is lower than in the wider Washington area (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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 95.6% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 96.0% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 94.5% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 97.0% | 91.2% | 90.9% | 89.3% |
| Change | +1.4 pts | +1.7 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 21718: 97.0% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%.
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 21718
| Period | ZIP 21718 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1.6% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 4.2% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 5.0% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 12.3% | 4.8% | 5.0% | 5.4% |
| Change | +10.7 pts | −1.1 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 21718 runs well above the national rate: 12.3% of the labor force was out of work and looking, 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 21718 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 21718 | 2.72 | 55.8 | 6.1% | 13.2% | 11.8% | 1974 | $2,351 | 41.7% | 97.0% | 12.3% |
| ZIP 21779 | 2.52 | 42.0 | 8.9% | 24.6% | 7.8% | 1973 | $1,379 | 38.9% | 91.4% | 3.7% |
| ZIP 21758 | 2.81 | 40.5 | 6.2% | 14.3% | 3.1% | 1992 | $1,563 | 47.6% | 95.4% | 5.2% |
| ZIP 21755 | 2.93 | 43.5 | 4.8% | 13.5% | 6.8% | 1989 | $1,332 | 46.7% | 95.3% | 3.1% |
| 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 21756 | 2.83 | 42.0 | 15.1% | 7.8% | 4.3% | 1991 | $1,450 | 31.7% | 94.6% | 4.1% |
| ZIP 21714 | 2.16 | 52.3 | 4.2% | 35.9% | 10.4% | 1968 | $1,774 | 42.0% | 100.0% | 0.0% |
| ZIP 21782 | 2.45 | 48.6 | 8.9% | 11.6% | 9.8% | 1979 | $1,191 | 26.4% | 93.2% | 9.4% |
| ZIP 20180 | 3.05 | 43.3 | 6.4% | 4.9% | 6.9% | 1997 | $2,081 | 54.8% | 93.7% | 4.9% |
| ZIP 21777 | 2.94 | 43.4 | 5.5% | 7.5% | 3.9% | 1997 | $2,068 | 44.3% | 94.7% | 3.9% |
All figures 2020–24.
Zip codes with similar populations: 61949, IL · 79548, TX · 80024, CO · 80423, CO · 80740, CO · 80801, CO · 81087, CO · 57645, SD · 57755, SD · 38054, TN
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 21718. 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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