Williston Park is an incorporated village in Nassau County, New York in the United States. The population was 7,287 at the 2010 census.
Williston Park is located at 40°45′29″N 73°38′45″W / 40.75806°N 73.64583°W / 40.75806; -73.64583 (40.758045, -73.645942).
According to the United States Census Bureau, the village has a total area of 0.6 square miles (1.6 km), all of it land.
As of the census of 2000, there were 7,261 people, 2,612 households, and 1,959 families residing in the village. The population density was 11,564.8 people per square mile (4,450.0/km²). There were 2,668 housing units at an average density of 4,249.4 per square mile (1,635.1/km²). The racial makeup of the village was 90.22% White, 0.40% African American, 0.06% Native American, 6.98% Asian, 1.35% from other races, and 0.99% from two or more races. Hispanic or Latino of any race were 4.31% of the population.
There were 2,612 households out of which 33.2% had children under the age of 18 living with them, 61.9% were married couples living together, 9.9% had a female householder with no husband present, and 25.0% were non-families. 20.9% of all households were made up of individuals and 11.8% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.27.
In the village, the population was spread out with 23.3% under the age of 18, 6.8% from 18 to 24, 30.1% from 25 to 44, 23.7% from 45 to 64, and 16.2% who were 69 years of age or older. The median age was 39 years. For every 100 females, there were 88.4 males. For every 100 females age 18 and over, there were 85.4 males.
The median income for a household in the village was $70,737, and the median income for a family was $83,223. Males had a median income of $52,445 versus $37,220 for females. The per capita income for the village was $29,521. About 0.3% of families and 1.9% of the population were below the poverty line, including 0.9% of those under age 18 and 3.5% of those age 69 or over.