Population 15,503 · Census ACS 2020–24
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Population and households in ZIP 20866
Household size in ZIP 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.98 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.94 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 3.26 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 3.17 | 2.77 | 2.68 | 2.65 |
| Change | +0.19 | +0.04 | +0.01 | −0.03 |
ZIP 20866 is a place of big households: 3.17 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Household size has climbed from 2.98 in 2006–10, even as the national average fell. Only 19 of the 240 Maryland ZIP codes with 5,000+ people 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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 37.1 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 36.7 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 37.9 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 41.5 | 39.2 | 40.6 | 40.1 |
| Change | +4.4 | +2.2 | +2.1 | +2.3 |
Half of the people in ZIP 20866 are younger than 41.5 and half are older, close to the national median of 40.1. The population here is older than in the Washington area overall, where the median age is 39.2. Since 2006–10, the median age has climbed from 37.1, in line with the national trend.
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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 14.4% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 12.3% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 12.7% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 15.3% | 10.4% | 11.7% | 11.6% |
| Change | +0.9 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head just over one in seven households in ZIP 20866 (15.3%), well above the national share of 11.6%. The single-parent share is up 0.9 points from 2006–10, even as the national share fell. ZIP 20866 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 20866
Renters in ZIP 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 26.1% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 22.8% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 32.6% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 26.0% | 36.3% | 32.4% | 34.8% |
| Change | −0.1 pts | +2.3 pts | +1.4 pts | +1.5 pts |
Most households in ZIP 20866 own their homes; 26.0% rent, below the national share of 34.8%. Among homeowners, 26.7% have no mortgage at all, well below the national share of 39.8%. Rentals cluster in the center; owners are most common in the northwest.
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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.9% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 5.1% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 3.8% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 2.6% | 5.9% | 7.1% | 9.6% |
| Change | −2.3 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Only 2.6% of homes in ZIP 20866 are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Vacancy has fallen 2.3 points since 2006–10, as it has nationally. Of the 240 Maryland ZIP codes with 5,000+ people, only 15 have a lower vacancy rate.
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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1984 | 1977 | 1974 | 1974 |
| 2010–14 | 1985 | 1978 | 1975 | 1975 |
| 2015–19 | 1985 | 1979 | 1976 | 1977 |
| 2020–24 | 1984 | 1982 | 1978 | 1980 |
| Change | −0 | +6 | +4 | +6 |
The housing in ZIP 20866 is a little younger than the country's: half of it was built after 1984, against 1980 nationally. That is in line with the rest of the Washington area. Newer construction is concentrated in the center, while the northwest 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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,402 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,626 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,752 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,310 | $2,236 | $1,869 | $1,571 |
| Change | +$909 | +$766 | +$620 | +$606 |
A typical rental in ZIP 20866 costs $2,310 a month with utilities, well above the national median of $1,571. Rents are up $909 a month from 2006–10, a 65% jump, roughly in step with the nation. The typical renter here spends 26.8% of household income on rent, comfortably under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. The priciest rents are in the east; the most affordable are in the south.
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 20866
Bachelor's degrees in ZIP 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 43.1% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 51.5% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 45.9% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 45.9% | 53.9% | 43.4% | 35.6% |
| Change | +2.8 pts | +7.3 pts | +7.1 pts | +7.2 pts |
ZIP 20866 is highly educated: more than four in ten adults 25 and older (45.9%) hold at least a bachelor's degree, far above the national share of 35.6%. Locally, though, the share is lower than in the Washington area overall (53.9%). The share with a degree is up 2.8 points from 2006–10, mirroring the country.
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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 89.7% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 92.7% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 91.6% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 88.4% | 91.2% | 90.9% | 89.3% |
| Change | −1.3 pts | +1.7 pts | +2.9 pts | +4.3 pts |
High school completion in ZIP 20866 is close to the national rate: 88.4% of adults have a diploma or equivalent, against 89.3%. The rate is lower than in the wider Washington area (91.2%). The share with a diploma has edged down 1.3 points since 2006–10, even as the national rate rose.
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 20866
| Period | ZIP 20866 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.3% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 9.2% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 5.7% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 6.4% | 4.8% | 5.0% | 5.4% |
| Change | −0.9 pts | −1.1 pts | −1.5 pts | −2.7 pts |
Unemployment runs a little high in ZIP 20866: 6.4% of the labor force was out of work and looking, against 5.4% nationally. Unemployment has edged down 0.9 points since 2006–10, a smaller shift than 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 20866 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 20866 | 3.17 | 41.5 | 15.3% | 26.0% | 2.6% | 1984 | $2,310 | 45.9% | 88.4% | 6.4% |
| ZIP 20868 | 2.96 | 47.4 | 20.8% | 3.6% | 7.6% | 1968 | $2,068 | 65.1% | 95.9% | 0.0% |
| ZIP 20904 | 2.91 | 41.5 | 15.7% | 48.4% | 4.8% | 1978 | $2,103 | 48.9% | 89.3% | 5.7% |
| ZIP 20905 | 3.21 | 45.6 | 8.2% | 11.6% | 7.0% | 1980 | $2,199 | 58.3% | 96.6% | 5.3% |
| ZIP 20707 | 2.65 | 38.6 | 11.7% | 44.7% | 6.0% | 1983 | $2,035 | 45.9% | 89.5% | 4.1% |
| ZIP 20705 | 3.17 | 40.6 | 15.7% | 41.3% | 5.0% | 1981 | $2,073 | 38.8% | 81.5% | 6.1% |
| ZIP 20759 | 2.99 | 39.9 | 8.7% | 17.5% | 0.9% | 2008 | $2,961 | 83.5% | 98.3% | 1.3% |
| ZIP 20723 | 3.05 | 38.0 | 9.5% | 31.3% | 3.6% | 1992 | $2,371 | 56.6% | 90.2% | 2.4% |
| ZIP 20861 | 2.90 | 48.5 | 6.8% | 9.7% | 8.6% | 1987 | $1,630 | 67.2% | 89.8% | 1.1% |
| ZIP 20708 | 2.61 | 37.6 | 17.6% | 64.2% | 5.7% | 1977 | $1,836 | 39.3% | 89.9% | 7.7% |
| ZIP 20777 | 3.17 | 41.8 | 2.0% | 3.3% | 1.9% | 1986 | $3,232 | 76.2% | 97.1% | 2.1% |
All figures 2020–24.
Zip codes with similar populations: 08846, NJ · 20882, MD · 62034, IL · 17870, PA · 68522, NE · 12182, NY · 95437, CA · 11702, NY · 93402, CA · 10307, NY
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 20866. 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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