Stony Brook is a hamlet and census-designated place (CDP) in the Town of Brookhaven in Suffolk County, New York, on the North Shore of Long Island. Begun in the colonial era as an agricultural enclave, the hamlet experienced growth first as a resort town and then to its current state as one of Long Island’s major tourist towns and centers of education. Despite being referred to as a village by residents and tourists alike, Stony Brook has never been legally incorporated by the state. The population was 13,740 at the 2010 census.
Stony Brook is on the North Shore of Long Island, approximately 55 miles east of the New York City borough of Manhattan. The census-designated place occupies an irregular shape roughly 5 miles north to south and 1 mile east to west.
The historic core of Stony Brook was developed from the 17th century onward at the mouth of Stony Brook Harbor, a narrow inlet of the Long Island Sound. This section of town includes the Stony Brook Village Center, a planned commercial center in the style of New England clapboard architecture that opened in 1941. Nearby are the Long Island Museum, the Three Village Inn, and William Sidney Mount House. A peninsula in this vicinity known as the West Meadow includes a beach and wetlands reserve.
Stony Brook University is within and adjacent to the census-designated place, with its main campus less than 2 miles from Stony Brook’s historic center. It is primarily on the eastern side of the census-designated place, with a pedestrian entrance on Route 25a at the Stony Brook station of the Long Island Rail Road and a vehicular entrance on Nicolls Road. The local stretch of Route 25a contains shops and other commercial properties that cater to the university’s student body.
The southern (inland) portion of Stony Brook primarily consists of post-war residential development. The Stony Brook University Research and Development Park (in Stony Brook and adjacent St. James) occupies a buffer between this section and the university’s central campus. Forming Stony Brook’s official southern boundary is Route 347, a corridor with commercial development including an AMC Loews cinema within the CDP boundaries and the Smith Haven Mall nearby.
As of the census of 2010, there were 13,727 people, 4,758 households, and 3,787 families residing in the CDP. The population density was 2,390.5 per square mile (923.3/km²). There were 4,970 housing units at an average density of 865.5/sq mi (334.3/km²). The racial makeup of the CDP was 88.6% White, 14.4% from two or more races, 7.5% Asian, 4.4% Hispanic or Latin of any race, 1.7% African American, 0.25% from other races, 0.1% Native American, and 0.01% Pacific Islander.
There were 4,758 households out of which 39.2% had children under the age of 18 living with them, 71.3% were married couples living together, 6.3% had a female householder with no husband present, and 20.4% were non-families. 16.2% of all households were made up of individuals and 9.1% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.23.
In the CDP, the population was spread out with 26.9% under the age of 18, 5.8% from 18 to 24, 28.1% from 25 to 44, 26.5% from 45 to 64, and 12.7% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 95.2 males. For every 100 females age 18 and over, there were 91.2 males.
The median income for a household in the CDP was $90,009, and the median income for a family was $95,567. Males had a median income of $68,400 versus $41,770 for females. The per capita income for the CDP was $35,247. About 1.9% of families and 2.9% of the population were below the poverty line, including 1.9% of those under age 18 and 2.9% of those age 65 or over.