The Town of Brookhaven is the most populous of the ten towns of Suffolk County, New York, United States. Part of the New York metropolitan area, it is located approximately 50 miles from Manhattan. It is the only town in the county that stretches from the North Shore to the South Shore of Long Island. It is the largest of New York State’s 932 towns (by area with water), and the second most populous, exceeded only by the Town of Hempstead.
Brookhaven is located centrally on the geographic Long Island and extends from the North Shore to the South Shore. According to the United States Census Bureau, the town has a total area of 531.5 square miles (1,376.6 km²), of which 259.3 square miles (671.6 km²) is land and 272.2 square miles (705.1 km² or 51.22%) is water. It is the largest town in New York in terms of total area. Excluding water, however, there are four towns in the state with more land area: Webb in Herkimer County, Long Lake in Hamilton County, Arietta in Hamilton County, and Ohio in Herkimer County.
Brookhaven is bounded to the north and south by the Long Island Sound and the Atlantic Ocean. Riverhead and Southampton lie to the east, and Smithtown and Islip lie to the west.
A large part of Fire Island (accessible by a bridge at Smith Point) and the Great South Bay are in the town.
Bald Hill, a large hill in the hamlet of Farmingville, marks where the glacier which formed Long Island stopped. At the top of Bald Hill is a Vietnam veterans memorial. Telescope Hill, to the west of Bald Hill Cultural Park, is slightly taller at 334 feet (102 m) above sea level and the highest point in the town.
As of the census of 2000, there were 448,248 people, 146,828 households, and 112,910 families residing in the town. The population density was 1,728.8 people per square mile (667.5/km²). There were 155,406 housing units at an average density of 599.4 per square mile (231.4/km²). The racial makeup of the town was 68.43% White, 24.33% Black or African American, 0.23% Native American, 2.90% Asian, 0.03% Pacific Islander, 2.21% from other races, and 1.87% from two or more races. Hispanic or Latino people of any race were 8.04% of the population.
There were 146,828 households out of which 38.9% had children under the age of 18 living with them, 62.3% were married couples living together, 10.6% had a female householder with no husband present, and 23.1% were non-families. 17.9% of all households were made up of individuals and 7.2% had someone living alone who was 65 years of age or older. The average household size was 2.97 and the average family size was 3.37.
In the town, the population was spread out with 26.7% under the age of 18, 8.9% from 18 to 24, 31.5% from 25 to 44, 22.7% from 45 to 64, and 10.1% who were 65 years of age or older. The median age was 35 years. For every 100 females, there were 96.7 males. For every 100 females age 18 and over, there were 93.8 males.
According to a 2006 estimate, the median income for a household in the town was $73,566, and the median income for a family was $84,705. Males had a median income of $48,601 versus $32,157 for females. The per capita income for the town was $24,191. About 3.9% of families and 5.9% of the population were below the poverty line, including 6.5% of those under age 18 and 6.6% of those age 65 or over.