Seaford, New York Demographics & Population 2026
During the 2020–2024 ACS period, Seaford, New York had a total population of 15,549, the 125th largest community in New York, with a median household income of $172,557, which is 101% higher than the state average. The poverty rate is 3.6%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 101% above the state average — one of the wealthiest communities in New York.
- An exceptionally low poverty rate of 3.6% — among the lowest in New York.
Seaford Quick Facts
How Seaford Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 15,884 | 15,549 | -2.1% |
| Median household income | $156,488 | $172,557 | +10.3% |
| Median home value | $631,000 | $658,300 | +4.3% |
How Seaford Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 65 | National average: 61
Education
Educational Attainment (Adults 25+)
Seaford Rankings in New York
Explore New York Rankings
Other Cities in Nassau County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Hempstead | 58,801 | $90,420 | 14.4% | $459,500 |
| Levittown | 51,904 | $146,068 | 4.7% | $590,500 |
| Freeport | 44,088 | $120,625 | 7.4% | $505,900 |
| Hicksville | 43,780 | $144,471 | 3.9% | $634,100 |
| Valley Stream | 40,315 | $133,190 | 5.5% | $616,100 |
| East Meadow | 36,821 | $133,971 | 6.4% | $631,800 |
| Elmont | 36,518 | $114,217 | 5.0% | $602,900 |
| Baldwin | 34,994 | $145,472 | 6.6% | $593,800 |
| Long Beach | 34,756 | $140,739 | 7.6% | $696,400 |
| Uniondale | 33,148 | $124,684 | 9.2% | $539,000 |
Cities Similar to Seaford
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Greenlawn | 15,210 | $164,427 | $630,800 | 45.1% | 6.3% |
| Bellmore | 15,954 | $161,674 | $681,800 | 56.3% | 3.1% |
| Massapequa Park | 16,963 | $171,953 | $642,600 | 53.7% | 3.1% |
| Sayville | 15,408 | $147,120 | $637,200 | 55.0% | 4.9% |
| North New Hyde Park | 14,159 | $172,440 | $796,700 | 59.5% | 3.1% |
Population Overview
Seaford is a small city located in New York, within Nassau County. The total population is 15,549. It ranks as the 125th most populous out of 1,289 Census-designated places in New York.
Age Demographics
The median age in Seaford is 40.3 years. This is 1% higher than the state median of 39.8 years.
Economy, Income & Housing
The median household income in Seaford is $172,557. This is 101% higher than the state median of $85,974. It is also 114% higher than the national median of $80,734. The poverty rate stands at 3.6%. This is 74% lower than the state poverty rate of 14.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 3.7%. This is 43% lower than the state rate of 6.4%. The median home value is $658,300. Housing costs are 55% higher than the state median of $423,800. The home-value-to-income ratio is 3.8x. 92.9% of occupied housing units are owner-occupied. This homeownership rate is 71% higher than the state average of 54.4%.
Race & Ethnicity
The largest racial or ethnic group in Seaford is White (non-Hispanic), making up 82.0% of the population. Hispanic or Latino residents account for 8.4%. The White (non-Hispanic) population is significantly higher than the state average (82.0% vs 52.8%). The Black or African American population (3.5%) is well below the state average of 13.4%. The Hispanic or Latino population (8.4%) is well below the state average of 19.8%. The Asian population (4.0%) is well below the state average of 9.0%.
Education
46.0% of residents aged 25 and older hold a bachelor's degree or higher. This is 14% higher than the state rate of 40.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.3%. Notably, 20.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Seaford, New York is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New York state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,289 Census-designated places in New York. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Seaford, New York?
Seaford, New York has a population of 15,549 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Seaford, NY?
The median household income in Seaford is $172,557, which is 114% higher than the national median of $80,734.
What is the poverty rate in Seaford, NY?
The poverty rate in Seaford is 3.6%. This means approximately 553 residents live below the federal poverty line.
What is the racial makeup of Seaford, New York?
Seaford's population is 82.0% White, 3.5% Black, 8.4% Hispanic/Latino, and 4.0% Asian.
What is the median home value in Seaford, NY?
The median home value in Seaford is $658,300. The home-value-to-income ratio is 3.8x.
How educated is Seaford, New York?
46.0% of adults (25+) in Seaford hold a bachelor's degree or higher, and 20.0% hold a graduate or professional degree.