Population 12,448 · Census ACS 2020–24
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Population and households in ZIP 20851
Household size in ZIP 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.70 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 2.98 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 3.13 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 3.03 | 2.77 | 2.68 | 2.65 |
| Change | +0.32 | +0.04 | +0.01 | −0.03 |
Households in ZIP 20851 are large by national standards, averaging 3.03 people against 2.65 for the U.S. That usually means more families with children at home. Household size has climbed from 2.70 in 2006–10, even as the national average fell.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 38.3 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 38.9 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 38.2 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 40.6 | 39.2 | 40.6 | 40.1 |
| Change | +2.3 | +2.2 | +2.1 | +2.3 |
Half of the people in ZIP 20851 are younger than 40.6 and half are older, close to the national median of 40.1. Since 2006–10, the median age has climbed from 38.3, in line with the national trend. Residents skew youngest in the north and oldest in the east.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.8% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 12.0% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 12.2% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 13.1% | 10.4% | 11.7% | 11.6% |
| Change | +2.3 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head just over one in eight households in ZIP 20851 (13.1%), a bit above the national share of 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 20851
Renters in ZIP 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 26.5% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 30.8% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 32.3% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 29.8% | 36.3% | 32.4% | 34.8% |
| Change | +3.3 pts | +2.3 pts | +1.4 pts | +1.5 pts |
Most households in ZIP 20851 own their homes; 29.8% rent, a little below the national share of 34.8%. Among homeowners, 27.5% have no mortgage at all, well below the national share of 39.8%. Rentals cluster in the north; owners are most common in the east. Since 2006–10, the renter share has risen 3.3 points, in line with the national trend.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.9% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 6.4% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 5.3% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 4.4% | 5.9% | 7.1% | 9.6% |
| Change | −0.6 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Only 4.4% of homes in ZIP 20851 are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Since 2006–10, vacancy has edged down 0.6 points, a smaller shift than nationally.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1957 | 1977 | 1974 | 1974 |
| 2010–14 | 1960 | 1978 | 1975 | 1975 |
| 2015–19 | 1961 | 1979 | 1976 | 1977 |
| 2020–24 | 1959 | 1982 | 1978 | 1980 |
| Change | +2 | +6 | +4 | +6 |
ZIP 20851 is a place of older homes: half were built before 1959, while the national median is 1980. That means established neighborhoods, and more houses that may need updating. Newer construction is concentrated in the north, while the center has the oldest housing. Only 22 of the 240 Maryland ZIP codes with 5,000+ people have older homes.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,777 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,884 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $2,222 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,522 | $2,236 | $1,869 | $1,571 |
| Change | +$746 | +$766 | +$620 | +$606 |
The median renter in ZIP 20851 pays $2,522 a month for rent and utilities, well above the national median of $1,571. Rent has climbed $746 a month since 2006–10, up 42%, a slower climb than the nation's. Rent takes 32.0% of the typical renter's income, just over the 30% mark often used to define affordable rent. Renters on a budget will find the lowest rents in the west; the highest are in the center.
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 20851
Bachelor's degrees in ZIP 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 40.0% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 43.2% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 44.3% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 48.6% | 53.9% | 43.4% | 35.6% |
| Change | +8.5 pts | +7.3 pts | +7.1 pts | +7.2 pts |
College graduates are unusually common in ZIP 20851: 48.6% of adults 25 and older have a bachelor's degree or higher, against 35.6% nationally. Education tends to track local incomes and the kinds of jobs nearby. Even so, the share is lower than in the Washington area as a whole (53.9%). The share with a degree is up 8.5 points from 2006–10, in line with the national trend.
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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 86.1% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 88.3% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 82.3% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 84.3% | 91.2% | 90.9% | 89.3% |
| Change | −1.8 pts | +1.7 pts | +2.9 pts | +4.3 pts |
Nearly one in six adults in ZIP 20851 never finished high school, more than nationally: 84.3% have a diploma or equivalent, against 89.3% across the U.S. The share with a diploma is down 1.8 points from 2006–10, even as the national rate rose. ZIP 20851 has a lower share of high school graduates than at least four in five 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 20851
| Period | ZIP 20851 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.7% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 5.9% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 5.1% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 5.1% | 4.8% | 5.0% | 5.4% |
| Change | +0.4 pts | −1.1 pts | −1.5 pts | −2.7 pts |
At 5.1%, unemployment in ZIP 20851 is close to 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 20851 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 20851 | 3.03 | 40.6 | 13.1% | 29.8% | 4.4% | 1959 | $2,522 | 48.6% | 84.3% | 5.1% |
| ZIP 20853 | 3.40 | 42.2 | 8.3% | 14.2% | 4.4% | 1966 | $2,693 | 49.4% | 86.7% | 5.2% |
| ZIP 20852 | 2.34 | 39.7 | 8.7% | 58.7% | 6.1% | 1984 | $2,428 | 73.4% | 93.8% | 3.3% |
| ZIP 20850 | 2.40 | 42.6 | 6.7% | 49.2% | 6.1% | 1989 | $2,531 | 68.0% | 95.1% | 4.3% |
| ZIP 20896 | 2.88 | 49.7 | 4.3% | 3.4% | 5.0% | 1952 | $3,250 | 88.3% | 99.4% | 2.4% |
| ZIP 20906 | 2.96 | 42.5 | 13.3% | 33.5% | 5.1% | 1977 | $2,007 | 41.2% | 85.5% | 7.0% |
| ZIP 20855 | 2.72 | 42.0 | 5.2% | 26.4% | 2.4% | 1987 | $2,390 | 66.7% | 94.7% | 4.7% |
| ZIP 20895 | 2.73 | 42.8 | 5.9% | 22.7% | 5.1% | 1961 | $2,664 | 73.4% | 96.0% | 3.8% |
| ZIP 20854 | 3.01 | 48.1 | 5.5% | 10.9% | 4.7% | 1979 | $3,231 | 85.2% | 97.4% | 2.9% |
| ZIP 20902 | 3.17 | 37.1 | 14.4% | 35.5% | 5.0% | 1968 | $2,321 | 45.7% | 82.8% | 6.4% |
| ZIP 20880 | 2.44 | 46.6 | 8.9% | 27.8% | 2.9% | 1965 | $1,905 | 52.7% | 93.5% | 6.0% |
All figures 2020–24.
Zip codes with similar populations: 06478, CT · 37924, TN · 48360, MI · 53534, WI · 53558, WI · 28748, NC · 27863, NC · 64124, MO · 07436, NJ · 07853, NJ
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 20851. 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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