South Valley Stream, New York Demographics & Population 2026

Population Overview

South Valley Stream is a small city located in New York, within Nassau County. The total population is 6,512. It ranks as the 299th most populous out of 1,289 Census-designated places in New York.

Age Demographics

The median age in South Valley Stream is 37.1 years. This is 7% lower than the state median of 39.8 years. 11.9% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in South Valley Stream is $145,000. This is 69% higher than the state median of $85,974. It is also 80% higher than the national median of $80,734. The poverty rate stands at 9.8%. This is 30% lower than the state poverty rate of 14.0%. The unemployment rate is 3.6%. This is 43% lower than the state rate of 6.4%. The median home value is $656,800. Housing costs are 55% higher than the state median of $423,800. The home-value-to-income ratio is 4.5x. 84.6% of occupied housing units are owner-occupied. This homeownership rate is 56% higher than the state average of 54.4%.

Race & Ethnicity

South Valley Stream is a highly diverse community where no single racial or ethnic group constitutes a majority of the population. Black or African American residents account for 24.4%. The Black or African American population is significantly higher than the state average (24.4% vs 13.4%). The Hispanic or Latino population (9.5%) is well below the state average of 19.8%. The Asian population is significantly higher than the state average (23.7% vs 9.0%).

Education

56.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% 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 90.8%. Notably, 19.4% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for South Valley Stream, 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.