Population 62,659 · Census ACS 2020–24
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Population and households in ZIP 21740
Household size in ZIP 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.48 | 2.68 | 2.68 |
| 2010–14 | 2.54 | 2.73 | 2.73 |
| 2015–19 | 2.52 | 2.74 | 2.71 |
| 2020–24 | 2.48 | 2.68 | 2.65 |
| Change | −0.01 | +0.01 | −0.03 |
The average household in ZIP 21740 has 2.48 people, under the U.S. average of 2.65. The biggest households, usually families with children, are concentrated in the northwest. ZIP 21740 has smaller households than the great majority of Maryland ZIP codes.
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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 38.5 | 38.5 | 37.7 |
| 2010–14 | 38.7 | 39.3 | 38.6 |
| 2015–19 | 39.7 | 40.2 | 39.6 |
| 2020–24 | 39.6 | 40.6 | 40.1 |
| Change | +1.1 | +2.1 | +2.3 |
Half of the people in ZIP 21740 are younger than 39.6 and half are older, close to the national median of 40.1. Since 2006–10, the median age has climbed from 38.5, mirroring the country. Residents skew youngest in the west and oldest in the southeast.
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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 15.6% | 12.5% | 12.3% |
| 2010–14 | 15.1% | 12.6% | 12.3% |
| 2015–19 | 15.4% | 11.7% | 11.6% |
| 2020–24 | 15.8% | 11.7% | 11.6% |
| Change | +0.1 pts | −0.9 pts | −0.6 pts |
Single parents head nearly one in six households in ZIP 21740 (15.8%), well above the national share of 11.6%. ZIP 21740 has a higher share of single-parent households than the great majority of Maryland ZIP codes.
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 21740
Renters in ZIP 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 46.7% | 31.0% | 33.3% |
| 2010–14 | 46.5% | 32.9% | 35.6% |
| 2015–19 | 45.4% | 33.1% | 36.0% |
| 2020–24 | 44.6% | 32.4% | 34.8% |
| Change | −2.0 pts | +1.4 pts | +1.5 pts |
More than four in ten households in ZIP 21740 rent their homes (44.6%), above the national share of 34.8%. Among homeowners, 35.7% have no mortgage at all, below the national share of 39.8%. Rentals cluster in the northeast; owners are most common in the northwest. The renter share has fallen 2.0 points since 2006–10, 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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 11.5% | 9.0% | 11.4% |
| 2010–14 | 10.0% | 8.9% | 11.4% |
| 2015–19 | 11.5% | 8.9% | 11.1% |
| 2020–24 | 8.0% | 7.1% | 9.6% |
| Change | −3.6 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21740: 8.0% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. That is in line with the rest of Maryland. Since 2006–10, vacancy has fallen 3.6 points, mirroring the country.
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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1968 | 1974 | 1974 |
| 2010–14 | 1969 | 1975 | 1975 |
| 2015–19 | 1968 | 1976 | 1977 |
| 2020–24 | 1972 | 1978 | 1980 |
| Change | +4 | +4 | +6 |
Homes in ZIP 21740 run older than the national norm, with a median build year of 1972 against 1980. The median year built has moved up from 1968 in 2006–10, a sign of steady new building. Newer construction is concentrated in the northwest, while the center 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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $833 | $1,249 | $965 |
| 2010–14 | $916 | $1,363 | $1,040 |
| 2015–19 | $935 | $1,576 | $1,213 |
| 2020–24 | $1,189 | $1,869 | $1,571 |
| Change | +$356 | +$620 | +$606 |
The median renter in ZIP 21740 pays $1,189 a month for rent and utilities, well below the national median of $1,571. Rent has climbed $356 a month since 2006–10, up 43%, a slower climb than the nation's. Rent takes 30.5% of the typical renter's income, just over the 30% mark often used to define affordable rent. Rents run highest in the northwest and lowest in the center.
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 21740
Bachelor's degrees in ZIP 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 14.9% | 36.3% | 28.4% |
| 2010–14 | 15.9% | 37.7% | 29.6% |
| 2015–19 | 18.5% | 40.5% | 32.1% |
| 2020–24 | 21.2% | 43.4% | 35.6% |
| Change | +6.3 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 21740: 21.2% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%. Since 2006–10, the share with a degree has risen 6.3 points, mirroring the country. Of the 240 Maryland ZIP codes with 5,000+ people, only 17 have a lower share of college graduates.
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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 80.0% | 88.0% | 84.9% |
| 2010–14 | 84.6% | 89.1% | 86.1% |
| 2015–19 | 84.5% | 90.2% | 87.7% |
| 2020–24 | 86.5% | 90.9% | 89.3% |
| Change | +6.5 pts | +2.9 pts | +4.3 pts |
Nearly one in seven adults in ZIP 21740 never finished high school, a bit more than nationally: 86.5% have a diploma or equivalent, against 89.3% across the U.S. Since 2006–10, the share with a diploma has risen 6.5 points, in line with the national trend. ZIP 21740 has a lower share of high school graduates than at least four in five Maryland ZIP codes.
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 21740
| Period | ZIP 21740 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.0% | 6.5% | 8.1% |
| 2010–14 | 11.6% | 8.1% | 9.4% |
| 2015–19 | 6.8% | 5.1% | 5.6% |
| 2020–24 | 5.2% | 5.0% | 5.4% |
| Change | −2.8 pts | −1.5 pts | −2.7 pts |
At 5.2%, unemployment in ZIP 21740 is close to the national rate of 5.4%. Unemployment is down 2.8 points from 2006–10, mirroring the country. 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 21740 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 21740 | 2.48 | 39.6 | 15.8% | 44.6% | 8.0% | 1972 | $1,189 | 21.2% | 86.5% | 5.2% |
| ZIP 21734 | 1.99 | 52.8 | 2.3% | 50.9% | 3.9% | 1953 | $1,256 | 19.4% | 90.2% | 3.4% |
| ZIP 21742 | 2.57 | 41.1 | 12.4% | 29.7% | 6.1% | 1980 | $1,294 | 31.3% | 89.8% | 4.4% |
| ZIP 21767 | 2.39 | 40.3 | 15.3% | 37.5% | 2.9% | 1985 | $1,020 | 18.8% | 81.6% | 0.1% |
| ZIP 21795 | 2.60 | 41.3 | 16.1% | 35.2% | 12.6% | 1975 | $1,202 | 27.4% | 91.1% | 4.5% |
| ZIP 21781 | 2.69 | 43.3 | 14.6% | 19.3% | 4.5% | 2002 | $1,370 | 23.6% | 90.4% | 3.0% |
| ZIP 21746 | 2.48 | 37.3 | 12.6% | 33.2% | 6.7% | 1974 | $1,147 | 2.3% | 70.6% | 4.2% |
| ZIP 21733 | 2.88 | 39.9 | 5.1% | 15.9% | 6.9% | 1987 | $1,237 | 25.7% | 93.3% | 1.3% |
| ZIP 17263 | 2.81 | 32.0 | 9.3% | 17.3% | 1.4% | 1979 | $1,249 | 21.5% | 92.1% | 2.1% |
| ZIP 21713 | 2.58 | 45.8 | 9.8% | 17.1% | 3.7% | 1981 | $1,208 | 29.3% | 93.4% | 2.0% |
| ZIP 21783 | 2.76 | 43.4 | 11.7% | 19.7% | 9.2% | 1973 | $1,137 | 23.6% | 91.2% | 3.1% |
All figures 2020–24.
Zip codes with similar populations: 93905, CA · 92562, CA · 33178, FL · 33027, FL · 92620, CA · 32822, FL · 32244, FL · 92630, CA · 92677, CA · 22554, VA
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 21740. 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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