Population 18,836 · Census ACS 2020–24
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Population and households in Seaford
Household size in Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 3.04 | 2.79 | 2.68 | 2.68 |
| 2010–14 | 2.97 | 2.85 | 2.72 | 2.73 |
| 2015–19 | 2.94 | 2.82 | 2.69 | 2.71 |
| 2020–24 | 2.97 | 2.79 | 2.65 | 2.65 |
| Change | −0.07 | −0.00 | −0.03 | −0.03 |
Households in Seaford are large by national standards, averaging 2.97 people against 2.65 for the U.S. That usually means more families with children at home. Since 2006–10, household size has edged down from 3.04, in line with the national trend.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 39.8 | 38.0 | 38.3 | 37.7 |
| 2010–14 | 42.0 | 38.7 | 39.0 | 38.6 |
| 2015–19 | 43.7 | 39.8 | 40.2 | 39.6 |
| 2020–24 | 42.6 | 40.4 | 40.8 | 40.1 |
| Change | +2.7 | +2.4 | +2.5 | +2.3 |
Seaford skews a little older than the country: its median age is 42.6, against 40.1 nationally. Since 2006–10, the median age has climbed from 39.8, as it has nationally. Residents skew youngest in the west and oldest in the northeast.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.8% | 13.1% | 13.1% | 12.3% |
| 2010–14 | 5.7% | 12.8% | 12.7% | 12.3% |
| 2015–19 | 5.0% | 11.4% | 11.6% | 11.6% |
| 2020–24 | 5.1% | 11.6% | 11.6% | 11.6% |
| Change | −2.7 pts | −1.5 pts | −1.5 pts | −0.6 pts |
Single-parent households are relatively rare in Seaford: 5.1% of households, against 11.6% nationally. Since 2006–10, the single-parent share has fallen 2.7 points, a much bigger shift than nationally. Seaford has a lower share of single-parent households than the great majority of New York cities.
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 Seaford
Renters in Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 8.6% | 47.1% | 44.8% | 33.3% |
| 2010–14 | 10.0% | 48.7% | 46.2% | 35.6% |
| 2015–19 | 7.8% | 48.8% | 46.2% | 36.0% |
| 2020–24 | 6.4% | 48.6% | 45.7% | 34.8% |
| Change | −2.2 pts | +1.5 pts | +0.9 pts | +1.5 pts |
Only 6.4% of households in Seaford rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Among homeowners, 38.2% have no mortgage at all, about the same as nationally. The renter share is down 2.2 points from 2006–10, even as the national share rose. Only 25 of the 488 New York cities with 5,000+ people have a lower share of renters.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.7% | 9.1% | 10.3% | 11.4% |
| 2010–14 | 5.1% | 9.0% | 10.4% | 11.4% |
| 2015–19 | 3.6% | 9.1% | 11.0% | 11.1% |
| 2020–24 | 4.5% | 7.9% | 9.7% | 9.6% |
| Change | −0.2 pts | −1.2 pts | −0.6 pts | −1.8 pts |
Only 4.5% of homes in Seaford are vacant, far below the national rate of 9.6%, which usually means strong demand for housing. Compared with other New York cities, Seaford has a lower vacancy rate than most.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 1956 | 1957 | 1956 | 1974 |
| 2010–14 | 1956 | 1958 | 1957 | 1975 |
| 2015–19 | 1958 | 1959 | 1958 | 1977 |
| 2020–24 | 1958 | 1962 | 1961 | 1980 |
| Change | +2 | +5 | +5 | +6 |
The housing in Seaford is old by national standards: the median home dates to 1958, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. The picture is much the same across the New York area. Newer construction is concentrated in the south, while the center 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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | $1,778 | $1,268 | $1,095 | $965 |
| 2010–14 | $1,759 | $1,377 | $1,201 | $1,040 |
| 2015–19 | $2,263 | $1,645 | $1,426 | $1,213 |
| 2020–24 | $2,630 | $2,060 | $1,794 | $1,571 |
| Change | +$852 | +$792 | +$698 | +$606 |
The median renter in Seaford pays $2,630 a month for rent and utilities, well above the national median of $1,571. Rent has climbed $852 a month since 2006–10, up 48%, a slower climb than the nation's. Rent takes 33.1% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched. Renters on a budget will find the lowest rents in the center; the highest 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 Seaford
Bachelor's degrees in Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 35.9% | 35.0% | 31.9% | 28.4% |
| 2010–14 | 36.0% | 36.7% | 33.4% | 29.6% |
| 2015–19 | 44.7% | 39.9% | 36.2% | 32.1% |
| 2020–24 | 47.5% | 43.6% | 39.8% | 35.6% |
| Change | +11.5 pts | +8.6 pts | +8.0 pts | +7.2 pts |
Seaford is highly educated: nearly half of adults 25 and older (47.5%) hold at least a bachelor's degree, far above the national share of 35.6%. Since 2006–10, the share with a degree has risen 11.5 points, in line with the national trend. College graduates are most concentrated in the west and least in the center.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 94.5% | 83.7% | 84.0% | 84.9% |
| 2010–14 | 95.0% | 84.6% | 84.9% | 86.1% |
| 2015–19 | 96.1% | 86.2% | 86.5% | 87.7% |
| 2020–24 | 97.2% | 86.9% | 87.3% | 89.3% |
| Change | +2.7 pts | +3.3 pts | +3.3 pts | +4.3 pts |
Finishing high school is nearly universal in Seaford: 97.2% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. The share with a diploma is up 2.7 points from 2006–10, mirroring the country. Only 43 of the 488 New York cities with 5,000+ people have a higher share of high school graduates.
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 Seaford
| Period | Seaford | New York area | New York | U.S. |
|---|---|---|---|---|
| 2006–10 | 5.9% | 7.9% | 7.7% | 8.1% |
| 2010–14 | 5.8% | 9.5% | 9.2% | 9.4% |
| 2015–19 | 3.8% | 5.7% | 5.7% | 5.6% |
| 2020–24 | 3.4% | 6.9% | 6.6% | 5.4% |
| Change | −2.5 pts | −0.9 pts | −1.2 pts | −2.7 pts |
Jobs have been easier to find in Seaford than nationally: unemployment was 3.4%, against 5.4%. Unemployment has fallen 2.5 points since 2006–10, as it has 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).
Seaford compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Seaford | 2.97 | 42.6 | 5.1% | 6.4% | 4.5% | 1958 | $2,630 | 47.5% | 97.2% | 3.4% |
| Wantagh | 3.21 | 41.6 | 7.7% | 4.8% | 4.8% | 1956 | $2,743 | 52.6% | 96.6% | 4.7% |
| Massapequa | 2.99 | 44.7 | 4.2% | 3.4% | 3.8% | 1958 | $2,529 | 53.5% | 97.2% | 5.1% |
| North Wantagh | 2.84 | 44.1 | 7.3% | 5.2% | 3.5% | 1955 | $1,908 | 44.3% | 97.5% | 3.0% |
| Bellmore | 3.06 | 41.8 | 6.3% | 8.9% | 4.9% | 1955 | $2,782 | 55.9% | 98.4% | 4.4% |
| North Massapequa | 2.84 | 43.7 | 7.0% | 5.5% | 2.5% | 1956 | $2,387 | 50.7% | 96.4% | 3.8% |
| Massapequa Park | 2.88 | 44.3 | 3.7% | 2.0% | 3.4% | 1957 | $3,469 | 54.8% | 97.0% | 4.3% |
| North Bellmore | 3.21 | 42.4 | 7.7% | 9.9% | 4.9% | 1957 | $2,741 | 52.1% | 96.5% | 3.7% |
| East Massapequa | 3.10 | 40.4 | 9.7% | 10.4% | 4.2% | 1962 | $1,983 | 49.3% | 97.1% | 4.9% |
| Merrick | 2.98 | 43.5 | 5.7% | 3.4% | 1.1% | 1953 | $2,945 | 65.1% | 96.0% | 3.9% |
| Plainedge | 3.07 | 41.1 | 8.1% | 9.3% | 3.6% | 1956 | $3,091 | 42.0% | 95.1% | 6.2% |
All figures 2020–24.
Cities with similar populations: Rex, GA · Johnstown, CO · Justin, TX · Kensington, CT · Kings Park, NY · Kirksville, MO · La Canada Flintridge, CA · La Crescenta, CA · La Crescenta-Montrose, CA · La Grange, 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 Seaford. 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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