Population 35,044 · Census ACS 2020–24
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Population and households in ZIP 21742
Household size in ZIP 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.55 | 2.68 | 2.68 |
| 2010–14 | 2.49 | 2.73 | 2.73 |
| 2015–19 | 2.53 | 2.74 | 2.71 |
| 2020–24 | 2.57 | 2.68 | 2.65 |
| Change | +0.02 | +0.01 | −0.03 |
The average household in ZIP 21742 has 2.57 people, a bit under the U.S. average of 2.65. The biggest households, usually families with children, are concentrated in the north.
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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 39.0 | 38.5 | 37.7 |
| 2010–14 | 41.4 | 39.3 | 38.6 |
| 2015–19 | 40.5 | 40.2 | 39.6 |
| 2020–24 | 41.1 | 40.6 | 40.1 |
| Change | +2.2 | +2.1 | +2.3 |
Half of the people in ZIP 21742 are younger than 41.1 and half are older, close to the national median of 40.1. Since 2006–10, the median age has climbed from 39.0, in line with the national trend. The youngest areas are in the center, the oldest in the northeast.
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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 10.0% | 12.5% | 12.3% |
| 2010–14 | 12.2% | 12.6% | 12.3% |
| 2015–19 | 9.7% | 11.7% | 11.6% |
| 2020–24 | 12.4% | 11.7% | 11.6% |
| Change | +2.3 pts | −0.9 pts | −0.6 pts |
Single-parent households are about as common in ZIP 21742 as they are nationally: 12.4%, against 11.6%. The single-parent share has risen 2.3 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 21742
Renters in ZIP 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 30.0% | 31.0% | 33.3% |
| 2010–14 | 37.4% | 32.9% | 35.6% |
| 2015–19 | 33.3% | 33.1% | 36.0% |
| 2020–24 | 29.7% | 32.4% | 34.8% |
| Change | −0.3 pts | +1.4 pts | +1.5 pts |
About three in ten households in ZIP 21742 rent their homes (29.7%), a little below the national share of 34.8%; the rest own. Among homeowners, 33.1% have no mortgage at all, below the national share of 39.8%. Rentals cluster in the southeast; owners are most common in the northeast.
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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 5.9% | 9.0% | 11.4% |
| 2010–14 | 6.9% | 8.9% | 11.4% |
| 2015–19 | 7.1% | 8.9% | 11.1% |
| 2020–24 | 6.1% | 7.1% | 9.6% |
| Change | +0.2 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21742: 6.1% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. That is in line with the rest of Maryland.
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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1978 | 1974 | 1974 |
| 2010–14 | 1977 | 1975 | 1975 |
| 2015–19 | 1978 | 1976 | 1977 |
| 2020–24 | 1980 | 1978 | 1980 |
| Change | +3 | +4 | +6 |
Homes in ZIP 21742 are the same age as the nation's housing: the median home was built in 1980. Newer construction is concentrated in the north, 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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $885 | $1,249 | $965 |
| 2010–14 | $1,048 | $1,363 | $1,040 |
| 2015–19 | $1,104 | $1,576 | $1,213 |
| 2020–24 | $1,294 | $1,869 | $1,571 |
| Change | +$408 | +$620 | +$606 |
A typical rental in ZIP 21742 costs $1,294 a month with utilities, below the national median of $1,571. Rents are up $408 a month from 2006–10, a 46% rise, a slower climb than the nation's. The typical renter here spends 25.8% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. Rents run highest in the southeast and lowest in the northeast.
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 21742
Bachelor's degrees in ZIP 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 28.7% | 36.3% | 28.4% |
| 2010–14 | 28.9% | 37.7% | 29.6% |
| 2015–19 | 33.2% | 40.5% | 32.1% |
| 2020–24 | 31.3% | 43.4% | 35.6% |
| Change | +2.5 pts | +7.1 pts | +7.2 pts |
Just over three in ten adults 25 and older in ZIP 21742 (31.3%) have a bachelor's degree or higher, a little below the national share of 35.6%. Since 2006–10, the share with a degree has risen 2.5 points, as it has nationally. College graduates are most concentrated in the north and least in the south.
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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 88.9% | 88.0% | 84.9% |
| 2010–14 | 90.5% | 89.1% | 86.1% |
| 2015–19 | 90.4% | 90.2% | 87.7% |
| 2020–24 | 89.8% | 90.9% | 89.3% |
| Change | +0.9 pts | +2.9 pts | +4.3 pts |
About as many adults in ZIP 21742 have finished high school as nationally: 89.8%, against 89.3%. The share with a diploma is up 0.9 points from 2006–10, a smaller shift than 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 21742
| Period | ZIP 21742 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 5.7% | 6.5% | 8.1% |
| 2010–14 | 7.1% | 8.1% | 9.4% |
| 2015–19 | 3.9% | 5.1% | 5.6% |
| 2020–24 | 4.4% | 5.0% | 5.4% |
| Change | −1.3 pts | −1.5 pts | −2.7 pts |
Jobs have been a little easier to find in ZIP 21742 than nationally: unemployment was 4.4%, against 5.4%. Unemployment has edged down 1.3 points since 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 21742 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 21742 | 2.57 | 41.1 | 12.4% | 29.7% | 6.1% | 1980 | $1,294 | 31.3% | 89.8% | 4.4% |
| 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 21767 | 2.39 | 40.3 | 15.3% | 37.5% | 2.9% | 1985 | $1,020 | 18.8% | 81.6% | 0.1% |
| ZIP 17263 | 2.81 | 32.0 | 9.3% | 17.3% | 1.4% | 1979 | $1,249 | 21.5% | 92.1% | 2.1% |
| ZIP 21783 | 2.76 | 43.4 | 11.7% | 19.7% | 9.2% | 1973 | $1,137 | 23.6% | 91.2% | 3.1% |
| ZIP 21746 | 2.48 | 37.3 | 12.6% | 33.2% | 6.7% | 1974 | $1,147 | 2.3% | 70.6% | 4.2% |
| ZIP 21781 | 2.69 | 43.3 | 14.6% | 19.3% | 4.5% | 2002 | $1,370 | 23.6% | 90.4% | 3.0% |
| ZIP 21795 | 2.60 | 41.3 | 16.1% | 35.2% | 12.6% | 1975 | $1,202 | 27.4% | 91.1% | 4.5% |
| ZIP 17272 | 2.16 | 40.6 | 9.1% | 32.8% | 10.6% | 1979 | $1,683 | 8.6% | 96.2% | 7.8% |
| ZIP 21733 | 2.88 | 39.9 | 5.1% | 15.9% | 6.9% | 1987 | $1,237 | 25.7% | 93.3% | 1.3% |
All figures 2020–24.
Zip codes with similar populations: 55449, MN · 54016, WI · 44512, OH · 46239, IN · 48174, MI · 98375, WA · 02125, MA · 95482, CA · 91750, CA · 90260, CA
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 21742. 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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