In 2019, Nassau County, NY had a population of 1.36M people with a median age of 41.9 and a median household income of $118,453. Between 2018 and 2019 the population of Nassau County, NY declined from 1.36M to 1.36M, a −0.104% decrease and its median household income grew from $116,304 to $118,453, a 1.85% increase.
The 5 largest ethnic groups in Nassau County, NY are White (Non-Hispanic) (58.2%), Black or African American (Non-Hispanic) (11.3%), Asian (Non-Hispanic) (10.3%), White (Hispanic) (9.16%), and Other (Hispanic) (6.14%). 30.2% of the households in Nassau County, NY speak a non-English language at home as their primary language, and 93% of the residents in Nassau County, NY are U.S. citizens.
In 2019, the median property value in Nassau County, NY was $561,400, and the homeownership rate was 80.6%. Most people in Nassau County, NY drove alone to work, and the average commute time was 35.1 minutes. The average car ownership in Nassau County, NY was 2 cars per household.