East Williston is an incorporated village in Nassau County, New York in the United States. The population was 2,556 at the 2010 census.
East Williston is located at 40°45′35″N 73°38′0″W / 40.75972°N 73.63333°W / 40.75972; -73.63333 (40.759688, -73.633225).
According to the United States Census Bureau, the village has a total area of 0.6 square miles (1.6 km), all land.
As of the census of 2000, there were 2,503 people, 833 households, and 717 families residing in the village. The population density was 4,447.5 people per square mile (1,725.7/km²). There were 846 housing units at an average density of 1,503.2 per square mile (583.3/km²). The racial makeup of the village was 95.25% White, 0.36% African American, 0.04% Native American, 3.36% Asian, 0.08% Pacific Islander, 0.24% from other races, and 0.68% from two or more races. Hispanic or Latino of any race were 2.36% of the population.
There were 833 households out of which 42.5% had children under the age of 18 living with them, 77.4% were married couples living together, 6.4% had a female householder with no husband present, and 13.9% were non-families. 12.7% of all households were made up of individuals and 8.8% had someone living alone who was 65 years of age or older. The average household size was 3.00 and the average family size was 3.29.
In the village, the population was spread out with 28.2% under the age of 18, 5.8% from 18 to 24, 22.7% from 25 to 44, 27.8% from 45 to 64, and 15.5% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 95.4 males. For every 100 females age 18 and over, there were 90.7 males.
The median income for a household in the village was $109,111, and the median income for a family was $118,611. Males had a median income of $90,952 versus $44,861 for females. The per capita income for the village was $50,484. About 1.4% of families and 1.7% of the population were below the poverty line, including 2.6% of those under age 18 and 1.0% of those age 65 or over.