Population 4,406 · Census ACS 2020–24
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Population and households in ZIP 21817
Household size in ZIP 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 2.36 | 2.68 | 2.68 |
| 2010–14 | 2.54 | 2.73 | 2.73 |
| 2015–19 | 2.29 | 2.74 | 2.71 |
| 2020–24 | 2.29 | 2.68 | 2.65 |
| Change | −0.07 | +0.01 | −0.03 |
Households in ZIP 21817 are small: just 2.29 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 44.7 | 38.5 | 37.7 |
| 2010–14 | 39.0 | 39.3 | 38.6 |
| 2015–19 | 48.4 | 40.2 | 39.6 |
| 2020–24 | 41.0 | 40.6 | 40.1 |
| Change | −3.7 | +2.1 | +2.3 |
At 41.0, the median age in ZIP 21817 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 dropped from 44.7, but in a place this small, survey estimates can swing a lot from one release to the next.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 14.8% | 12.5% | 12.3% |
| 2010–14 | 18.4% | 12.6% | 12.3% |
| 2015–19 | 18.9% | 11.7% | 11.6% |
| 2020–24 | 13.2% | 11.7% | 11.6% |
| Change | −1.6 pts | −0.9 pts | −0.6 pts |
Single-parent households are a bit more common in ZIP 21817 than nationally: 13.2%, against 11.6%.
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 21817
Renters in ZIP 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 36.5% | 31.0% | 33.3% |
| 2010–14 | 37.7% | 32.9% | 35.6% |
| 2015–19 | 36.4% | 33.1% | 36.0% |
| 2020–24 | 27.5% | 32.4% | 34.8% |
| Change | −9.1 pts | +1.4 pts | +1.5 pts |
More than a quarter of households in ZIP 21817 rent their homes (27.5%), below the national share of 34.8%; the rest own. Just over four in ten owners (42.0%) have paid off their mortgages, about the same as 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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 25.6% | 9.0% | 11.4% |
| 2010–14 | 22.0% | 8.9% | 11.4% |
| 2015–19 | 26.5% | 8.9% | 11.1% |
| 2020–24 | 20.7% | 7.1% | 9.6% |
| Change | −4.9 pts | −1.9 pts | −1.8 pts |
Vacancy is high in ZIP 21817: 20.7% of homes are empty, far above the national rate of 9.6%. In resort and lake areas that usually means seasonal and vacation homes; elsewhere it can point to weak demand.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 1964 | 1974 | 1974 |
| 2010–14 | 1971 | 1975 | 1975 |
| 2015–19 | 1970 | 1976 | 1977 |
| 2020–24 | 1969 | 1978 | 1980 |
| Change | +5 | +4 | +6 |
ZIP 21817 is a place of older homes: half were built before 1969, while the national median is 1980. That means established neighborhoods, and more houses that may need updating.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | $689 | $1,249 | $965 |
| 2010–14 | $691 | $1,363 | $1,040 |
| 2015–19 | $656 | $1,576 | $1,213 |
| 2020–24 | $899 | $1,869 | $1,571 |
| Change | +$210 | +$620 | +$606 |
A typical rental in ZIP 21817 costs $899 a month with utilities, well below the national median of $1,571. The typical renter here spends 25.6% 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 21817
Bachelor's degrees in ZIP 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 19.3% | 36.3% | 28.4% |
| 2010–14 | 15.8% | 37.7% | 29.6% |
| 2015–19 | 14.0% | 40.5% | 32.1% |
| 2020–24 | 23.4% | 43.4% | 35.6% |
| Change | +4.0 pts | +7.1 pts | +7.2 pts |
College degrees are relatively uncommon in ZIP 21817: 23.4% of adults 25 and older hold a bachelor's or higher, well below the national share of 35.6%.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 84.8% | 88.0% | 84.9% |
| 2010–14 | 81.3% | 89.1% | 86.1% |
| 2015–19 | 79.7% | 90.2% | 87.7% |
| 2020–24 | 85.4% | 90.9% | 89.3% |
| Change | +0.6 pts | +2.9 pts | +4.3 pts |
About one in seven adults in ZIP 21817 never finished high school, more than nationally: 85.4% have a diploma or equivalent, against 89.3% across the U.S.
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 21817
| Period | ZIP 21817 | Maryland | U.S. |
|---|---|---|---|
| 2006–10 | 8.7% | 6.5% | 8.1% |
| 2010–14 | 12.7% | 8.1% | 9.4% |
| 2015–19 | 8.7% | 5.1% | 5.6% |
| 2020–24 | 7.6% | 5.0% | 5.4% |
| Change | −1.1 pts | −1.5 pts | −2.7 pts |
Unemployment in ZIP 21817 runs well above the national rate: 7.6% of the labor force was out of work and looking, against 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 21817 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 21817 | 2.29 | 41.0 | 13.2% | 27.5% | 20.7% | 1969 | $899 | 23.4% | 85.4% | 7.6% |
| ZIP 21838 | 2.49 | 48.5 | 5.9% | 11.3% | 18.4% | 1977 | $944 | 18.1% | 93.5% | 3.9% |
| ZIP 23427 | 2.03 | 59.3 | 5.0% | 5.0% | 62.1% | 1962 | $1,242 | 6.7% | 88.3% | 2.1% |
| ZIP 21866 | 1.88 | 56.8 | 9.9% | 24.1% | 37.4% | 1954 | $1,370 | 5.0% | 72.1% | 11.4% |
| ZIP 23426 | 2.03 | 59.3 | 5.0% | 5.0% | 62.1% | 1962 | $1,242 | 6.7% | 88.3% | 2.1% |
| ZIP 21824 | 1.88 | 56.8 | 9.9% | 24.1% | 37.4% | 1954 | $1,370 | 5.0% | 72.1% | 11.4% |
| ZIP 23488 | 1.99 | 41.0 | 13.2% | 50.6% | 20.8% | 1978 | $1,048 | 4.9% | 70.9% | 3.9% |
| ZIP 23440 | 1.57 | 65.9 | 13.8% | 4.3% | 38.3% | 1978 | $1,023 | 2.4% | 68.7% | 8.1% |
| ZIP 23409 | 2.70 | 38.2 | 15.9% | 21.8% | 26.1% | 1957 | $1,342 | 8.1% | 81.4% | 1.5% |
| ZIP 23416 | 2.45 | 51.0 | 8.8% | 33.9% | 19.7% | 1981 | $1,165 | 19.5% | 81.3% | 4.1% |
| ZIP 23359 | 2.33 | 47.9 | 14.5% | 19.4% | 18.3% | 1972 | $819 | 7.8% | 62.9% | 3.4% |
All figures 2020–24.
Zip codes with similar populations: 65753, MO · 35772, AL · 35971, AL · 36250, AL · 36477, AL · 36726, AL · 37353, TN · 37370, TN · 61739, IL · 62285, IL
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 21817. 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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