Population 2,609 · Census ACS 2020–24
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Population and households in ZIP 21631
Household size in ZIP 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.47 | 2.68 | 2.68 |
| 2010–14 | 2.52 | 2.73 | 2.73 |
| 2015–19 | 2.43 | 2.74 | 2.71 |
| 2020–24 | 2.49 | 2.68 | 2.65 |
| Change | +0.02 | +0.01 | −0.03 |
The average household in ZIP 21631 has 2.49 people, a bit under the U.S. average of 2.65.
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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 43.4 | 38.5 | 37.7 |
| 2010–14 | 44.6 | 39.3 | 38.6 |
| 2015–19 | 46.9 | 40.2 | 39.6 |
| 2020–24 | 50.1 | 40.6 | 40.1 |
| Change | +6.7 | +2.1 | +2.3 |
With a median age of 50.1, ZIP 21631 is noticeably older than the country as a whole (40.1), an age mix that tilts toward empty nesters and retirees. Since 2006–10, the median age has climbed from 43.4, but in a place this small, survey estimates can swing a lot from one release to the next.
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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 14.3% | 12.5% | 12.3% |
| 2010–14 | 8.0% | 12.6% | 12.3% |
| 2015–19 | 11.8% | 11.7% | 11.6% |
| 2020–24 | 10.5% | 11.7% | 11.6% |
| Change | −3.9 pts | −0.9 pts | −0.6 pts |
Single-parent households are a bit less common in ZIP 21631 than nationally: 10.5%, against 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 21631
Renters in ZIP 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 12.5% | 31.0% | 33.3% |
| 2010–14 | 13.8% | 32.9% | 35.6% |
| 2015–19 | 17.5% | 33.1% | 36.0% |
| 2020–24 | 18.3% | 32.4% | 34.8% |
| Change | +5.8 pts | +1.4 pts | +1.5 pts |
Only 18.3% of households in ZIP 21631 rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 42.5% have no mortgage at all, about the same as 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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 14.8% | 9.0% | 11.4% |
| 2010–14 | 11.2% | 8.9% | 11.4% |
| 2015–19 | 19.1% | 8.9% | 11.1% |
| 2020–24 | 7.8% | 7.1% | 9.6% |
| Change | −7.0 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21631: 7.8% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. Maryland 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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1970 | 1974 | 1974 |
| 2010–14 | 1981 | 1975 | 1975 |
| 2015–19 | 1979 | 1976 | 1977 |
| 2020–24 | 1983 | 1978 | 1980 |
| Change | +13 | +4 | +6 |
The typical home in ZIP 21631 was built around 1983, about the same vintage as the country's housing overall (1980). Homes here are newer than in Maryland overall, where the median home dates to 1978.
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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $962 | $1,249 | $965 |
| 2010–14 | $973 | $1,363 | $1,040 |
| 2015–19 | $1,222 | $1,576 | $1,213 |
| 2020–24 | $1,198 | $1,869 | $1,571 |
| Change | +$237 | +$620 | +$606 |
The median renter in ZIP 21631 pays $1,198 a month for rent and utilities, well below the national median of $1,571. The typical renter here spends 26.2% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally.
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 21631
Bachelor's degrees in ZIP 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 19.5% | 36.3% | 28.4% |
| 2010–14 | 20.1% | 37.7% | 29.6% |
| 2015–19 | 23.0% | 40.5% | 32.1% |
| 2020–24 | 20.6% | 43.4% | 35.6% |
| Change | +1.1 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 21631: 20.6% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 83.0% | 88.0% | 84.9% |
| 2010–14 | 87.2% | 89.1% | 86.1% |
| 2015–19 | 91.0% | 90.2% | 87.7% |
| 2020–24 | 90.3% | 90.9% | 89.3% |
| Change | +7.3 pts | +2.9 pts | +4.3 pts |
High school completion in ZIP 21631 is close to the national rate: 90.3% of adults have a diploma or equivalent, against 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 21631
| Period | ZIP 21631 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 12.3% | 6.5% | 8.1% |
| 2010–14 | 8.3% | 8.1% | 9.4% |
| 2015–19 | 9.9% | 5.1% | 5.6% |
| 2020–24 | 6.8% | 5.0% | 5.4% |
| Change | −5.5 pts | −1.5 pts | −2.7 pts |
Unemployment runs high in ZIP 21631: 6.8% of the labor force was out of work and looking, against 5.4% nationally. 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 21631 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 21631 | 2.49 | 50.1 | 10.5% | 18.3% | 7.8% | 1983 | $1,198 | 20.6% | 90.3% | 6.8% |
| ZIP 21664 | 3.10 | 33.1 | 22.8% | 29.0% | 7.4% | 1982 | $1,481 | 27.1% | 95.1% | 4.3% |
| ZIP 21835 | 1.96 | 62.7 | 7.1% | 26.1% | 11.0% | 1980 | $1,020 | 14.2% | 79.9% | 2.4% |
| ZIP 21643 | 2.70 | 41.1 | 8.8% | 17.1% | 10.8% | 1983 | $1,105 | 12.6% | 79.4% | 2.3% |
| ZIP 21613 | 2.30 | 42.3 | 14.2% | 48.3% | 17.0% | 1970 | $1,140 | 20.8% | 86.3% | 8.5% |
| ZIP 21673 | 2.28 | 47.4 | 13.7% | 24.8% | 20.9% | 1982 | $1,364 | 35.6% | 94.8% | 5.3% |
| ZIP 21869 | 2.57 | 49.0 | 4.7% | 13.2% | 18.1% | 1963 | $1,437 | 13.9% | 86.5% | 5.3% |
| ZIP 21659 | 2.71 | 40.5 | 17.2% | 16.6% | 11.6% | 1986 | $943 | 11.4% | 81.3% | 8.0% |
| ZIP 21654 | 1.89 | 65.2 | 8.3% | 13.7% | 30.8% | 1975 | $1,915 | 61.8% | 95.5% | 10.5% |
| ZIP 21861 | 2.53 | 37.3 | 19.2% | 15.8% | 9.0% | 1938 | $1,258 | 17.5% | 91.9% | 3.1% |
| ZIP 21677 | 2.33 | 52.4 | 5.4% | 20.5% | 23.4% | 1976 | $1,256 | 18.0% | 85.2% | 3.0% |
All figures 2020–24.
Zip codes with similar populations: 50216, IA · 26719, WV · 26408, WV · 27939, NC · 51445, IA · 56557, MN · 12138, NY · 62677, IL · 10984, NY · 04419, ME
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 21631. 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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