Population 3,387 · Census ACS 2020–24
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Population and households in ZIP 21750
Household size in ZIP 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.38 | 2.68 | 2.68 |
| 2010–14 | 2.53 | 2.73 | 2.73 |
| 2015–19 | 2.50 | 2.74 | 2.71 |
| 2020–24 | 2.05 | 2.68 | 2.65 |
| Change | −0.32 | +0.01 | −0.03 |
ZIP 21750 is a place of small households, averaging 2.05 people against 2.65 for the U.S., which points to many singles, couples and roommates and relatively few children. Since 2006–10, household size has dropped from 2.38, but in a place this small, much of that may be survey noise rather than real change.
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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 42.0 | 38.5 | 37.7 |
| 2010–14 | 42.4 | 39.3 | 38.6 |
| 2015–19 | 44.5 | 40.2 | 39.6 |
| 2020–24 | 48.4 | 40.6 | 40.1 |
| Change | +6.4 | +2.1 | +2.3 |
With a median age of 48.4, ZIP 21750 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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.7% | 12.5% | 12.3% |
| 2010–14 | 12.0% | 12.6% | 12.3% |
| 2015–19 | 9.0% | 11.7% | 11.6% |
| 2020–24 | 7.5% | 11.7% | 11.6% |
| Change | −1.2 pts | −0.9 pts | −0.6 pts |
Single-parent households are relatively rare in ZIP 21750: 7.5% of households, against 11.6% nationally.
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 21750
Renters in ZIP 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 26.1% | 31.0% | 33.3% |
| 2010–14 | 31.6% | 32.9% | 35.6% |
| 2015–19 | 26.8% | 33.1% | 36.0% |
| 2020–24 | 25.4% | 32.4% | 34.8% |
| Change | −0.8 pts | +1.4 pts | +1.5 pts |
Most households in ZIP 21750 own their homes; 25.4% rent, below the national share of 34.8%. Nearly four in ten owners (37.6%) have paid off their mortgages, 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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.6% | 9.0% | 11.4% |
| 2010–14 | 14.4% | 8.9% | 11.4% |
| 2015–19 | 13.3% | 8.9% | 11.1% |
| 2020–24 | 12.7% | 7.1% | 9.6% |
| Change | +4.1 pts | −1.9 pts | −1.8 pts |
More homes sit empty in ZIP 21750 than nationally: 12.7%, 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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1967 | 1974 | 1974 |
| 2010–14 | 1964 | 1975 | 1975 |
| 2015–19 | 1965 | 1976 | 1977 |
| 2020–24 | 1972 | 1978 | 1980 |
| Change | +5 | +4 | +6 |
The housing in ZIP 21750 is old by national standards: the median home dates to 1972, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates.
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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $583 | $1,249 | $965 |
| 2010–14 | $560 | $1,363 | $1,040 |
| 2015–19 | $725 | $1,576 | $1,213 |
| 2020–24 | $969 | $1,869 | $1,571 |
| Change | +$386 | +$620 | +$606 |
The median renter in ZIP 21750 pays $969 a month for rent and utilities, well below the national median of $1,571. Rent takes 41.1% 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 21750
Bachelor's degrees in ZIP 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.2% | 36.3% | 28.4% |
| 2010–14 | 9.5% | 37.7% | 29.6% |
| 2015–19 | 11.7% | 40.5% | 32.1% |
| 2020–24 | 12.2% | 43.4% | 35.6% |
| Change | +3.9 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 21750: 12.2% 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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 75.1% | 88.0% | 84.9% |
| 2010–14 | 83.5% | 89.1% | 86.1% |
| 2015–19 | 87.4% | 90.2% | 87.7% |
| 2020–24 | 92.0% | 90.9% | 89.3% |
| Change | +16.9 pts | +2.9 pts | +4.3 pts |
High school completion in ZIP 21750 is a bit above the national rate: 92.0% of adults have a diploma or equivalent, against 89.3%. Maryland as a whole looks much the same.
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 21750
| Period | ZIP 21750 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 6.3% | 6.5% | 8.1% |
| 2010–14 | 11.8% | 8.1% | 9.4% |
| 2015–19 | 6.3% | 5.1% | 5.6% |
| 2020–24 | 2.2% | 5.0% | 5.4% |
| Change | −4.1 pts | −1.5 pts | −2.7 pts |
The job market in ZIP 21750 has been strong: just 2.2% of the labor force was out of work and looking, well below the national rate of 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 21750 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 21750 | 2.05 | 48.4 | 7.5% | 25.4% | 12.7% | 1972 | $969 | 12.2% | 92.0% | 2.2% |
| ZIP 17267 | 2.56 | 44.0 | 8.9% | 17.6% | 10.0% | 1980 | $837 | 21.4% | 91.5% | 3.9% |
| ZIP 21711 | 2.77 | 40.0 | 14.4% | 2.9% | 5.2% | 1990 | $847 | 21.0% | 94.9% | 4.9% |
| ZIP 17212 | 2.28 | 50.8 | 4.1% | 18.0% | 8.3% | 1978 | $947 | 16.2% | 88.9% | 2.5% |
| ZIP 17238 | 2.41 | 50.5 | 8.1% | 25.0% | 9.3% | 1973 | $922 | 15.0% | 87.1% | 2.8% |
| ZIP 21766 | 2.39 | 37.3 | 5.8% | 27.6% | 36.7% | 1993 | $736 | 28.5% | 95.3% | 10.0% |
| ZIP 17211 | 2.28 | 50.8 | 7.5% | 17.6% | 30.6% | 1979 | $861 | 12.7% | 88.9% | 5.3% |
| ZIP 21722 | 3.02 | 42.3 | 9.0% | 15.7% | 7.9% | 1977 | $950 | 19.1% | 92.4% | 1.5% |
| ZIP 17236 | 2.48 | 46.0 | 12.7% | 21.4% | 9.6% | 1971 | $1,250 | 21.0% | 91.9% | 3.7% |
| ZIP 15535 | 2.47 | 44.5 | 5.8% | 17.9% | 28.8% | 1976 | $768 | 12.1% | 86.4% | 3.5% |
| ZIP 21530 | 2.28 | 51.6 | 11.0% | 17.1% | 30.0% | 1974 | $817 | 21.4% | 92.4% | 7.2% |
All figures 2020–24.
Zip codes with similar populations: 03818, NH · 12134, NY · 13131, NY · 57039, SD · 17846, PA · 27019, NC · 61410, IL · 44609, OH · 49657, MI · 54874, WI
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 21750. 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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