The Village of Brookville is a village located within the town of Oyster Bay in Nassau County, New York. As of the 2010 United States Census, the village population was 3,465.
Brookville is located at 40°48′55″N 73°34′12″W / 40.81528°N 73.57000°W / 40.81528; -73.57000 (40.815199, -73.570058).
According to the United States Census Bureau, the village has a total area of 4.0 square miles (10 km), all of it land.
As of the census of 2000, there were 2,126 people, 631 households, and 569 families residing in the village. The population density was 530.5 people per square mile (204.7/km²). There were 648 housing units at an average density of 161.7 per square mile (62.4/km²). The racial makeup of the village was 89.75% White, 1.16% African American, 3.16% Asian, 0.56% from other races, and 1.36% from two or more races. Hispanic or Latino of any race were 6.68% of the population.
There were 631 households out of which 49.9% had children under the age of 18 living with them, 82.9% were married couples living together, 4.9% had a female householder with no husband present, and 9.8% were non-families. 7.9% of all households were made up of individuals and 4.6% had someone living alone who was 65 years of age or older. The average household size was 3.35 and the average family size was 3.49.
In the village, the population was spread out with 32.8% under the age of 18, 4.4% from 18 to 24, 26.0% from 25 to 44, 25.1% from 45 to 64, and 11.8% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 97.8 males. For every 100 females age 18 and over, there were 90.7 males.
The median income for a household in the village was in excess of $200,000 as was the median income for a family. Males had a median income of over $100,000 versus $60,238 for females. The per capita income for the village was $84,375. None of families or the population were below the poverty line, including none of those under age 18 or those age 65 or over.
As of 2009, Brookville topped BusinessWeek’s list of America’s 25 wealthiest towns based on average income and net worth.