Nassau County, New York Demographics 2026

Population Overview

Nassau County is located in New York with a total population of 1,388,138. It is the 6th most populous county out of 62 in New York. The county encompasses 2 Census-designated places.

Age Demographics

The median age in Nassau County is 41.8 years. This is 6% higher than the state median of 39.6 years.

Economy, Income & Housing

The median household income in Nassau County is $143,408. This is 70% higher than the state median of $84,578. Compared to the national median of $78,538, household income here is 83% higher. The poverty rate stands at 5.3%. This is 61% lower than the state poverty rate of 13.7%. The unemployment rate is 4.8%. This is 23% lower than the state rate of 6.2%. The median home value is $658,700. Housing costs are 63% higher than the state median of $403,000. The home-value-to-income ratio is 4.6x. 81.9% of occupied housing units are owner-occupied. This homeownership rate is 51% higher than the state average of 54.3%.

Race & Ethnicity

The largest racial or ethnic group in Nassau County is White (non-Hispanic), making up 55.4% of the population. Hispanic or Latino residents account for 18.5%.

Education

48.7% of residents aged 25 and older hold a bachelor's degree or higher. This places Nassau County in the top 10% of all cities in the state for educational attainment. This is 23% higher than the state rate of 39.6%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.2%. Notably, 22.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.