Population 19,686 · Census ACS 2020–24
Choose a measure to map it.Tap a measure to map it. Swipe the row for more. Arrows show the change since 2006–10.
Median age by neighborhoodHistory and comparison ↓︎
Younger residents
Older residents
Colorblind friendly
off
More maps of ZIP 21704: Best Neighborhoods · Walk Grade · Household income · Home prices · Race · Politics · Traffic noise · Internet
Population and households in ZIP 21704
Household size in ZIP 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.00 | 2.73 | 2.68 | 2.68 |
| 2010–14 | 3.00 | 2.82 | 2.73 | 2.73 |
| 2015–19 | 3.07 | 2.86 | 2.74 | 2.71 |
| 2020–24 | 3.16 | 2.77 | 2.68 | 2.65 |
| Change | +0.16 | +0.04 | +0.01 | −0.03 |
Households in ZIP 21704 are large by national standards, averaging 3.16 people against 2.65 for the U.S. That usually means more families with children at home. Since 2006–10, household size has climbed from 3.00, even as the national average fell. Of the 240 Maryland ZIP codes with 5,000+ people, only 21 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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 37.2 | 37.0 | 38.5 | 37.7 |
| 2010–14 | 38.6 | 37.6 | 39.3 | 38.6 |
| 2015–19 | 39.0 | 38.5 | 40.2 | 39.6 |
| 2020–24 | 39.5 | 39.2 | 40.6 | 40.1 |
| Change | +2.2 | +2.2 | +2.1 | +2.3 |
At 39.5, the median age in ZIP 21704 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 climbed from 37.2, mirroring the country.
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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.0% | 11.3% | 12.5% | 12.3% |
| 2010–14 | 10.9% | 11.3% | 12.6% | 12.3% |
| 2015–19 | 11.7% | 10.4% | 11.7% | 11.6% |
| 2020–24 | 11.0% | 10.4% | 11.7% | 11.6% |
| Change | +1.0 pts | −0.9 pts | −0.9 pts | −0.6 pts |
Single parents head just over one in ten households in ZIP 21704 (11.0%), close to the national share of 11.6%. The single-parent share has edged up 1.0 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 21704
Renters in ZIP 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.2% | 34.0% | 31.0% | 33.3% |
| 2010–14 | 15.7% | 36.6% | 32.9% | 35.6% |
| 2015–19 | 19.1% | 36.8% | 33.1% | 36.0% |
| 2020–24 | 18.1% | 36.3% | 32.4% | 34.8% |
| Change | +7.9 pts | +2.3 pts | +1.4 pts | +1.5 pts |
ZIP 21704 is largely a place of homeowners: only 18.1% of households rent, far below the national share of 34.8%. Owner-heavy areas like this tend to see less turnover. Among owners, 17.0% have paid off their mortgages, well below the national share of 39.8%. The renter share is up 7.9 points from 2006–10, a much bigger shift than 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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.7% | 8.7% | 9.0% | 11.4% |
| 2010–14 | 0.7% | 7.3% | 8.9% | 11.4% |
| 2015–19 | 3.0% | 6.6% | 8.9% | 11.1% |
| 2020–24 | 4.5% | 5.9% | 7.1% | 9.6% |
| Change | −1.2 pts | −2.8 pts | −1.9 pts | −1.8 pts |
Empty homes are scarce in ZIP 21704: just 4.5% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. The Washington area as a whole looks much the same. Vacancy is down 1.2 points from 2006–10, in line with the national trend.
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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1993 | 1977 | 1974 | 1974 |
| 2010–14 | 1995 | 1978 | 1975 | 1975 |
| 2015–19 | 1996 | 1979 | 1976 | 1977 |
| 2020–24 | 2007 | 1982 | 1978 | 1980 |
| Change | +14 | +6 | +4 | +6 |
ZIP 21704 has newer housing than the country as a whole: the median home was built in 2007, versus 1980 nationally. The median year built has moved up from 1993 in 2006–10, a sign of steady new building. Only two of the 240 Maryland ZIP codes with 5,000+ people have newer 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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,655 | $1,470 | $1,249 | $965 |
| 2010–14 | $1,645 | $1,583 | $1,363 | $1,040 |
| 2015–19 | $1,946 | $1,907 | $1,576 | $1,213 |
| 2020–24 | $2,356 | $2,236 | $1,869 | $1,571 |
| Change | +$700 | +$766 | +$620 | +$606 |
Rent in ZIP 21704 runs $2,356 a month at the median, utilities included, well above the U.S. median of $1,571. Rent has climbed $700 a month since 2006–10, up 42%, a slower climb than the nation's. Rent takes 31.4% of the typical renter's income, just over the 30% mark often used to define affordable rent. Rents run highest in the east and lowest in the north.
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 21704
Bachelor's degrees in ZIP 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 51.3% | 46.6% | 36.3% | 28.4% |
| 2010–14 | 53.3% | 48.2% | 37.7% | 29.6% |
| 2015–19 | 57.2% | 51.0% | 40.5% | 32.1% |
| 2020–24 | 59.2% | 53.9% | 43.4% | 35.6% |
| Change | +8.0 pts | +7.3 pts | +7.1 pts | +7.2 pts |
ZIP 21704 is highly educated: about six in ten adults 25 and older (59.2%) hold at least a bachelor's degree, far above the national share of 35.6%. The share with a degree is up 8.0 points from 2006–10, mirroring the country. College graduates are most concentrated in the center and least in the north.
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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.8% | 89.4% | 88.0% | 84.9% |
| 2010–14 | 96.4% | 90.2% | 89.1% | 86.1% |
| 2015–19 | 94.5% | 90.8% | 90.2% | 87.7% |
| 2020–24 | 95.6% | 91.2% | 90.9% | 89.3% |
| Change | +0.8 pts | +1.7 pts | +2.9 pts | +4.3 pts |
High school completion is high in ZIP 21704: 95.6% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Since 2006–10, the share with a diploma has edged up 0.8 points, a smaller shift than nationally.
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 21704
| Period | ZIP 21704 | Washington area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.7% | 5.9% | 6.5% | 8.1% |
| 2010–14 | 4.4% | 6.9% | 8.1% | 9.4% |
| 2015–19 | 3.0% | 4.7% | 5.1% | 5.6% |
| 2020–24 | 3.0% | 4.8% | 5.0% | 5.4% |
| Change | −2.7 pts | −1.1 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 21704 has been low: just 3.0% of the labor force was out of work and looking, well below the national rate of 5.4%. Unemployment has fallen 2.7 points since 2006–10, mirroring the country. 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 21704 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 21704 | 3.16 | 39.5 | 11.0% | 18.1% | 4.5% | 2007 | $2,356 | 59.2% | 95.6% | 3.0% |
| ZIP 21754 | 3.13 | 37.8 | 5.0% | 7.0% | 4.0% | 2006 | $2,111 | 62.7% | 98.2% | 1.9% |
| ZIP 21717 | 2.62 | 49.5 | 2.4% | 8.9% | 6.1% | 1982 | $2,298 | 33.6% | 96.8% | 0.0% |
| ZIP 21770 | 3.23 | 41.5 | 9.2% | 2.3% | 0.8% | 1993 | $1,812 | 52.5% | 97.8% | 2.3% |
| ZIP 21774 | 3.04 | 35.9 | 6.0% | 6.8% | 3.2% | 2002 | $2,182 | 61.3% | 97.0% | 2.3% |
| ZIP 21703 | 2.78 | 35.6 | 17.7% | 33.5% | 5.0% | 1999 | $2,150 | 43.6% | 92.5% | 2.7% |
| ZIP 21701 | 2.35 | 40.5 | 10.3% | 33.2% | 5.0% | 1980 | $1,777 | 51.0% | 93.7% | 3.6% |
| ZIP 21710 | 2.81 | 49.9 | 2.9% | 16.0% | 6.3% | 1995 | $2,230 | 51.0% | 93.0% | 1.2% |
| ZIP 21702 | 2.66 | 39.3 | 13.0% | 34.7% | 7.1% | 1990 | $2,044 | 40.6% | 88.2% | 3.6% |
| ZIP 20838 | 2.76 | 44.1 | 8.6% | 15.0% | 1.4% | 1975 | $1,672 | 60.5% | 94.5% | 0.2% |
| ZIP 21790 | 2.73 | 49.1 | 5.0% | 19.4% | 5.4% | 1998 | $2,172 | 45.2% | 92.6% | 3.7% |
All figures 2020–24.
Zip codes with similar populations: 77318, TX · 40361, KY · 42633, KY · 44278, OH · 53538, WI · 55066, MN · 55350, MN · 61550, IL · 63105, MO · 63137, MO
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 21704. 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.
No other site shows detail at this level for free. We are able to keep this site free by receiving a small commission from the referring links on this page. Please share or cite this page if you aren’t able to otherwise support our work.