Population 46,666 · Census ACS 2020–24
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Population and households in ZIP 21921
Household size in ZIP 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.77 | 2.64 | 2.68 | 2.68 |
| 2010–14 | 2.68 | 2.68 | 2.73 | 2.73 |
| 2015–19 | 2.76 | 2.65 | 2.74 | 2.71 |
| 2020–24 | 2.62 | 2.57 | 2.68 | 2.65 |
| Change | −0.15 | −0.07 | +0.01 | −0.03 |
Households in ZIP 21921 average 2.62 people, about the same as the country as a whole (2.65). Since 2006–10, household size has dropped from 2.77, a much bigger shift than nationally. The biggest households, usually families with children, are concentrated in the northwest.
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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 36.4 | 38.5 | 38.5 | 37.7 |
| 2010–14 | 39.5 | 39.3 | 39.3 | 38.6 |
| 2015–19 | 38.8 | 40.3 | 40.2 | 39.6 |
| 2020–24 | 41.8 | 40.4 | 40.6 | 40.1 |
| Change | +5.5 | +1.9 | +2.1 | +2.3 |
The median resident of ZIP 21921 is 41.8 years old, a bit older than the national median of 40.1. Since 2006–10, the median age has climbed from 36.4, as it has nationally. The youngest areas are in the northeast, the oldest in the center.
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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.6% | 12.2% | 12.5% | 12.3% |
| 2010–14 | 12.4% | 11.8% | 12.6% | 12.3% |
| 2015–19 | 13.2% | 11.7% | 11.7% | 11.6% |
| 2020–24 | 12.1% | 12.1% | 11.7% | 11.6% |
| Change | +1.5 pts | −0.1 pts | −0.9 pts | −0.6 pts |
Single-parent households are about as common in ZIP 21921 as they are nationally: 12.1%, against 11.6%. The single-parent share is up 1.5 points from 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 21921
Renters in ZIP 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 30.6% | 30.2% | 31.0% | 33.3% |
| 2010–14 | 31.0% | 32.1% | 32.9% | 35.6% |
| 2015–19 | 31.2% | 32.7% | 33.1% | 36.0% |
| 2020–24 | 30.4% | 33.2% | 32.4% | 34.8% |
| Change | −0.2 pts | +3.0 pts | +1.4 pts | +1.5 pts |
Most households in ZIP 21921 own their homes; 30.4% rent, a little below the national share of 34.8%. Among homeowners, 32.3% have no mortgage at all, below the national share of 39.8%. Rentals cluster in the center; owners are most common in the southwest.
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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 9.7% | 9.1% | 9.0% | 11.4% |
| 2010–14 | 8.6% | 9.2% | 8.9% | 11.4% |
| 2015–19 | 9.6% | 9.0% | 8.9% | 11.1% |
| 2020–24 | 8.1% | 6.9% | 7.1% | 9.6% |
| Change | −1.6 pts | −2.2 pts | −1.9 pts | −1.8 pts |
Vacancy is on the low side in ZIP 21921: 8.1% of homes sit empty, against 9.6% nationally, which points to steady demand for housing. The picture is much the same across the Philadelphia area. Vacancy is down 1.6 points from 2006–10, as it has 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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 1981 | 1964 | 1974 | 1974 |
| 2010–14 | 1981 | 1965 | 1975 | 1975 |
| 2015–19 | 1984 | 1965 | 1976 | 1977 |
| 2020–24 | 1985 | 1968 | 1978 | 1980 |
| Change | +4 | +4 | +4 | +6 |
Homes in ZIP 21921 are a bit newer than the national norm: the median home was built in 1985, versus 1980 across the U.S. The median year built has moved up from 1981 in 2006–10, a sign of steady new building. Newer construction is concentrated in the west, while the south 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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | $938 | $1,049 | $1,249 | $965 |
| 2010–14 | $1,042 | $1,147 | $1,363 | $1,040 |
| 2015–19 | $1,179 | $1,281 | $1,576 | $1,213 |
| 2020–24 | $1,483 | $1,631 | $1,869 | $1,571 |
| Change | +$545 | +$582 | +$620 | +$606 |
Rent in ZIP 21921 runs $1,483 a month at the median, utilities included, below the U.S. median of $1,571. Rent has climbed $545 a month since 2006–10, up 58%, a slower climb than the nation's. The typical renter here spends 29.8% 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 21921
Bachelor's degrees in ZIP 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 23.5% | 32.7% | 36.3% | 28.4% |
| 2010–14 | 24.9% | 34.4% | 37.7% | 29.6% |
| 2015–19 | 24.8% | 37.9% | 40.5% | 32.1% |
| 2020–24 | 28.3% | 42.3% | 43.4% | 35.6% |
| Change | +4.8 pts | +9.6 pts | +7.1 pts | +7.2 pts |
College degrees are less common in ZIP 21921 than nationally: 28.3% of adults 25 and older have a bachelor's or higher, against 35.6%. Since 2006–10, the share with a degree has risen 4.8 points, mirroring the country. College graduates are most concentrated in the northeast and least in the west.
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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 86.3% | 87.5% | 88.0% | 84.9% |
| 2010–14 | 88.2% | 88.9% | 89.1% | 86.1% |
| 2015–19 | 89.0% | 90.5% | 90.2% | 87.7% |
| 2020–24 | 91.8% | 91.9% | 90.9% | 89.3% |
| Change | +5.5 pts | +4.4 pts | +2.9 pts | +4.3 pts |
About nine in ten adults in ZIP 21921 have finished high school (91.8%), a bit above the national rate of 89.3%. The picture is much the same across the Philadelphia area. The share with a diploma has risen 5.5 points since 2006–10, mirroring the country.
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 21921
| Period | ZIP 21921 | Philadelphia area | Maryland | U.S. |
|---|---|---|---|---|
| 2006–10 | 6.6% | 8.4% | 6.5% | 8.1% |
| 2010–14 | 9.3% | 10.2% | 8.1% | 9.4% |
| 2015–19 | 6.0% | 6.3% | 5.1% | 5.6% |
| 2020–24 | 5.2% | 6.1% | 5.0% | 5.4% |
| Change | −1.3 pts | −2.3 pts | −1.5 pts | −2.7 pts |
At 5.2%, unemployment in ZIP 21921 is close to the national rate of 5.4%. The rate is lower than in the Philadelphia area as a whole (6.1%). 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 21921 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 21921 | 2.62 | 41.8 | 12.1% | 30.4% | 8.1% | 1985 | $1,483 | 28.3% | 91.8% | 5.2% |
| ZIP 21920 | 2.97 | 39.5 | 19.8% | 11.1% | 6.0% | 1980 | $1,353 | 32.1% | 84.3% | 1.4% |
| ZIP 19717 | 3.70 | 19.5 | 3.8% | 72.1% | 26.0% | 2000 | $2,066 | 69.8% | 96.7% | 6.5% |
| ZIP 21901 | 2.56 | 39.9 | 13.3% | 26.8% | 7.1% | 1993 | $1,518 | 34.1% | 92.6% | 5.6% |
| ZIP 19716 | 2.69 | 19.5 | 16.3% | 19.9% | 8.5% | 1965 | $1,408 | 68.8% | 99.9% | 8.5% |
| ZIP 19702 | 2.69 | 39.4 | 13.3% | 38.6% | 4.7% | 1992 | $1,705 | 38.7% | 93.2% | 4.1% |
| ZIP 19713 | 2.50 | 38.5 | 13.6% | 37.1% | 6.0% | 1972 | $1,504 | 32.5% | 91.8% | 4.1% |
| ZIP 21915 | 2.16 | 54.1 | 8.6% | 20.0% | 19.7% | 1982 | $958 | 18.6% | 94.3% | 6.2% |
| ZIP 19711 | 2.57 | 37.8 | 6.7% | 36.1% | 9.4% | 1978 | $1,688 | 54.8% | 95.6% | 5.0% |
| ZIP 21914 | 2.59 | 35.5 | 8.7% | 7.9% | 18.4% | 1973 | $1,522 | 36.2% | 94.8% | 24.4% |
| ZIP 19701 | 2.66 | 42.5 | 11.5% | 20.0% | 4.1% | 1996 | $1,814 | 37.7% | 93.3% | 5.2% |
All figures 2020–24.
Zip codes with similar populations: 94566, CA · 15642, PA · 20910, MD · 23188, VA · 27502, NC · 27540, NC · 98204, WA · 27613, NC · 28645, NC · 32137, 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 21921. 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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