Population 14,689 · Census ACS 2020–24
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Population and households in ZIP 20639
Household size in ZIP 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 3.21 | 2.68 | 2.68 |
| 2010–14 | 3.22 | 2.73 | 2.73 |
| 2015–19 | 3.25 | 2.74 | 2.71 |
| 2020–24 | 3.17 | 2.68 | 2.65 |
| Change | −0.04 | +0.01 | −0.03 |
Households in ZIP 20639 are large by national standards, averaging 3.17 people against 2.65 for the U.S. That usually means more families with children at home. Household size has edged down from 3.21 in 2006–10, mirroring the country. Of the 240 Maryland ZIP codes with 5,000+ people, only 18 have larger households.
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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 39.4 | 38.5 | 37.7 |
| 2010–14 | 42.4 | 39.3 | 38.6 |
| 2015–19 | 40.0 | 40.2 | 39.6 |
| 2020–24 | 40.2 | 40.6 | 40.1 |
| Change | +0.8 | +2.1 | +2.3 |
At 40.2, the median age in ZIP 20639 is close to the national median of 40.1, so its age mix looks much like the country's. Since 2006–10, the median age has crept up from 39.4, as it has nationally. Residents skew youngest in the west and oldest in the north.
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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 7.6% | 12.5% | 12.3% |
| 2010–14 | 8.7% | 12.6% | 12.3% |
| 2015–19 | 5.8% | 11.7% | 11.6% |
| 2020–24 | 7.9% | 11.7% | 11.6% |
| Change | +0.2 pts | −0.9 pts | −0.6 pts |
Single-parent households are relatively rare in ZIP 20639: 7.9% of households, against 11.6% nationally. ZIP 20639 has a lower share of single-parent households than most 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 20639
Renters in ZIP 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 4.7% | 31.0% | 33.3% |
| 2010–14 | 7.9% | 32.9% | 35.6% |
| 2015–19 | 8.7% | 33.1% | 36.0% |
| 2020–24 | 8.1% | 32.4% | 34.8% |
| Change | +3.4 pts | +1.4 pts | +1.5 pts |
ZIP 20639 is overwhelmingly a place of homeowners: only 8.1% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among homeowners, 24.0% have no mortgage at all, well below the national share of 39.8%. The renter share has risen 3.4 points since 2006–10, mirroring the country.
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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 7.9% | 9.0% | 11.4% |
| 2010–14 | 5.3% | 8.9% | 11.4% |
| 2015–19 | 6.3% | 8.9% | 11.1% |
| 2020–24 | 5.7% | 7.1% | 9.6% |
| Change | −2.2 pts | −1.9 pts | −1.8 pts |
Fewer homes sit empty in ZIP 20639 than nationally: 5.7%, against 9.6% for the U.S. That is in line with the rest of Maryland. Vacancy is down 2.2 points from 2006–10, 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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1989 | 1974 | 1974 |
| 2010–14 | 1988 | 1975 | 1975 |
| 2015–19 | 1992 | 1976 | 1977 |
| 2020–24 | 1990 | 1978 | 1980 |
| Change | +2 | +4 | +6 |
ZIP 20639 has newer housing than the country as a whole: the median home was built in 1990, versus 1980 nationally. The newest homes are mostly in the southeast, the oldest in the north.
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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $1,114 | $1,249 | $965 |
| 2010–14 | $1,413 | $1,363 | $1,040 |
| 2015–19 | $1,716 | $1,576 | $1,213 |
| 2020–24 | $1,519 | $1,869 | $1,571 |
| Change | +$405 | +$620 | +$606 |
Rent in ZIP 20639 runs $1,519 a month at the median, utilities included, close to the U.S. median of $1,571. Rents here are lower than in Maryland overall ($1,869). Rents are up $405 a month from 2006–10, a 36% rise, a slower climb than the nation's. The typical renter here spends 19.6% 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 20639
Bachelor's degrees in ZIP 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 32.5% | 36.3% | 28.4% |
| 2010–14 | 37.0% | 37.7% | 29.6% |
| 2015–19 | 37.2% | 40.5% | 32.1% |
| 2020–24 | 40.0% | 43.4% | 35.6% |
| Change | +7.5 pts | +7.1 pts | +7.2 pts |
College degrees are a bit more common in ZIP 20639 than nationally: 40.0% of adults 25 and older have a bachelor's or higher, against 35.6%. Even so, the share is lower than in Maryland as a whole (43.4%). The share with a degree is up 7.5 points from 2006–10, as it has nationally.
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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 94.9% | 88.0% | 84.9% |
| 2010–14 | 93.4% | 89.1% | 86.1% |
| 2015–19 | 97.4% | 90.2% | 87.7% |
| 2020–24 | 96.4% | 90.9% | 89.3% |
| Change | +1.5 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 20639: 96.4% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is up 1.5 points from 2006–10, in line with the national trend. ZIP 20639 has a higher share of high school graduates than the great majority of 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 20639
| Period | ZIP 20639 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 3.4% | 6.5% | 8.1% |
| 2010–14 | 7.2% | 8.1% | 9.4% |
| 2015–19 | 5.9% | 5.1% | 5.6% |
| 2020–24 | 2.4% | 5.0% | 5.4% |
| Change | −1.0 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 20639 has been low: just 2.4% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has edged down 1.0 points since 2006–10, as it has 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 20639 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 20639 | 3.17 | 40.2 | 7.9% | 8.1% | 5.7% | 1990 | $1,519 | 40.0% | 96.4% | 2.4% |
| ZIP 20689 | 2.76 | 46.7 | 3.5% | 8.1% | 2.5% | 1982 | $1,540 | 30.4% | 94.0% | 2.5% |
| ZIP 20732 | 2.73 | 41.4 | 9.8% | 13.7% | 7.8% | 1989 | $1,906 | 41.6% | 93.9% | 3.1% |
| ZIP 20678 | 2.57 | 39.9 | 9.7% | 19.1% | 6.6% | 1993 | $1,409 | 30.1% | 94.5% | 2.3% |
| ZIP 20736 | 3.00 | 40.1 | 7.3% | 7.3% | 6.4% | 1994 | $1,939 | 46.8% | 96.2% | 2.8% |
| ZIP 20608 | 2.75 | 45.9 | 4.4% | 24.3% | 13.3% | 1968 | $1,289 | 27.9% | 93.5% | 3.3% |
| ZIP 20714 | 2.45 | 40.9 | 9.2% | 20.8% | 9.2% | 1982 | $1,943 | 39.5% | 96.7% | 6.3% |
| ZIP 20612 | 3.07 | 41.4 | 17.5% | 4.0% | 5.2% | 1997 | $2,054 | 42.8% | 98.7% | 3.0% |
| ZIP 20758 | 2.73 | 43.3 | 3.4% | 4.9% | 9.0% | 1978 | $2,000 | 46.1% | 96.3% | 4.8% |
| ZIP 20754 | 3.29 | 40.2 | 6.0% | 8.4% | 4.2% | 1985 | $2,580 | 48.8% | 94.6% | 1.6% |
| ZIP 20779 | 2.52 | 42.9 | 3.8% | 6.2% | 10.0% | 1972 | $2,010 | 43.2% | 95.9% | 5.4% |
All figures 2020–24.
Zip codes with similar populations: 82072, WY · 28711, NC · 29624, SC · 29693, SC · 31523, GA · 32656, FL · 33149, FL · 37416, TN · 55108, MN · 75418, TX
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 20639. 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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