Population 4,604 · Census ACS 2020–24
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Population and households in ZIP 21830
Household size in ZIP 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.84 | 2.68 | 2.68 |
| 2010–14 | 2.76 | 2.73 | 2.73 |
| 2015–19 | 3.00 | 2.74 | 2.71 |
| 2020–24 | 2.82 | 2.68 | 2.65 |
| Change | −0.02 | +0.01 | −0.03 |
The typical household in ZIP 21830 holds 2.82 people, more than 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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 39.7 | 38.5 | 37.7 |
| 2010–14 | 40.2 | 39.3 | 38.6 |
| 2015–19 | 37.8 | 40.2 | 39.6 |
| 2020–24 | 38.0 | 40.6 | 40.1 |
| Change | −1.7 | +2.1 | +2.3 |
The median resident of ZIP 21830 is 38.0 years old, a few years younger than the national median of 40.1. The median age has dropped from 39.7 in 2006–10, 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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 10.7% | 12.5% | 12.3% |
| 2010–14 | 12.0% | 12.6% | 12.3% |
| 2015–19 | 9.3% | 11.7% | 11.6% |
| 2020–24 | 14.0% | 11.7% | 11.6% |
| Change | +3.3 pts | −0.9 pts | −0.6 pts |
Single parents head about one in seven households in ZIP 21830 (14.0%), above 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 21830
Renters in ZIP 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 16.2% | 31.0% | 33.3% |
| 2010–14 | 17.0% | 32.9% | 35.6% |
| 2015–19 | 16.2% | 33.1% | 36.0% |
| 2020–24 | 14.4% | 32.4% | 34.8% |
| Change | −1.7 pts | +1.4 pts | +1.5 pts |
ZIP 21830 is overwhelmingly a place of homeowners: only 14.4% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 30.4% have no mortgage at all, below 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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 11.3% | 9.0% | 11.4% |
| 2010–14 | 7.7% | 8.9% | 11.4% |
| 2015–19 | 9.4% | 8.9% | 11.1% |
| 2020–24 | 5.8% | 7.1% | 9.6% |
| Change | −5.6 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21830: 5.8% 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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1986 | 1974 | 1974 |
| 2010–14 | 1988 | 1975 | 1975 |
| 2015–19 | 1986 | 1976 | 1977 |
| 2020–24 | 1991 | 1978 | 1980 |
| Change | +5 | +4 | +6 |
ZIP 21830 has newer housing than the country as a whole: the median home was built in 1991, versus 1980 nationally.
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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $787 | $1,249 | $965 |
| 2010–14 | $1,069 | $1,363 | $1,040 |
| 2015–19 | $991 | $1,576 | $1,213 |
| 2020–24 | $1,372 | $1,869 | $1,571 |
| Change | +$586 | +$620 | +$606 |
Rent in ZIP 21830 runs $1,372 a month at the median, utilities included, below the U.S. median of $1,571. The typical renter here spends 29.6% of household income on rent, just 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 21830
Bachelor's degrees in ZIP 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 22.2% | 36.3% | 28.4% |
| 2010–14 | 33.7% | 37.7% | 29.6% |
| 2015–19 | 26.1% | 40.5% | 32.1% |
| 2020–24 | 38.8% | 43.4% | 35.6% |
| Change | +16.6 pts | +7.1 pts | +7.2 pts |
Nearly four in ten adults 25 and older in ZIP 21830 (38.8%) have a bachelor's degree or higher, a bit above the national share of 35.6%. Still, the share is lower than in Maryland as a whole (43.4%).
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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 86.5% | 88.0% | 84.9% |
| 2010–14 | 89.3% | 89.1% | 86.1% |
| 2015–19 | 92.6% | 90.2% | 87.7% |
| 2020–24 | 93.8% | 90.9% | 89.3% |
| Change | +7.3 pts | +2.9 pts | +4.3 pts |
High school completion in ZIP 21830 is above the national rate: 93.8% 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 21830
| Period | ZIP 21830 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 9.7% | 6.5% | 8.1% |
| 2010–14 | 6.3% | 8.1% | 9.4% |
| 2015–19 | 3.8% | 5.1% | 5.6% |
| 2020–24 | 5.1% | 5.0% | 5.4% |
| Change | −4.6 pts | −1.5 pts | −2.7 pts |
At 5.1%, unemployment in ZIP 21830 is close to the national rate of 5.4%. 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 21830 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 21830 | 2.82 | 38.0 | 14.0% | 14.4% | 5.8% | 1991 | $1,372 | 38.8% | 93.8% | 5.1% |
| ZIP 21801 | 2.40 | 37.4 | 11.9% | 42.4% | 8.7% | 1978 | $1,246 | 33.6% | 89.4% | 5.7% |
| ZIP 21837 | 2.70 | 40.7 | 9.0% | 12.9% | 4.2% | 1989 | $1,227 | 27.1% | 89.1% | 4.4% |
| ZIP 21856 | 2.47 | 52.2 | 18.3% | 15.4% | 8.2% | 1988 | $1,199 | 23.1% | 91.4% | 14.2% |
| ZIP 21826 | 3.11 | 31.1 | 11.0% | 27.7% | 10.7% | 1980 | $1,455 | 36.1% | 90.2% | 4.0% |
| ZIP 21875 | 2.59 | 38.2 | 12.1% | 27.4% | 8.9% | 1988 | $1,442 | 23.2% | 92.2% | 2.2% |
| ZIP 21802 | 2.27 | 21.3 | 7.2% | 89.9% | 8.2% | 1995 | $1,087 | 22.0% | 93.8% | 17.0% |
| ZIP 21804 | 2.54 | 35.7 | 13.2% | 50.0% | 8.7% | 1983 | $1,422 | 27.0% | 90.3% | 7.1% |
| ZIP 19940 | 3.00 | 45.6 | 9.9% | 15.1% | 9.0% | 1994 | $1,119 | 19.2% | 87.2% | 6.1% |
| ZIP 21861 | 2.53 | 37.3 | 19.2% | 15.8% | 9.0% | 1938 | $1,258 | 17.5% | 91.9% | 3.1% |
| ZIP 21869 | 2.57 | 49.0 | 4.7% | 13.2% | 18.1% | 1963 | $1,437 | 13.9% | 86.5% | 5.3% |
All figures 2020–24.
Zip codes with similar populations: 59072, MT · 35131, AL · 81252, CO · 55927, MN · 97462, OR · 07927, NJ · 13833, NY · 69201, NE · 29055, SC · 32180, FL
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 21830. 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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