Greenvale (historically known as Bull's Head, Cedar Swamp, and North Roslyn) is a hamlet and census-designated place (CDP) in the towns of North Hempstead and Oyster Bay in Nassau County, on the North Shore of Long Island, in New York, United States. It is considered part of the Greater Roslyn area, which is anchored by the Incorporated Village of Roslyn. The population was 1,069 at the time of the 2020 census.

History
Located between Roslyn and Brookville, the Greenvale station is known as the Long Island Rail Road stop for the C.W. Post Campus of Long Island University and the New York Institute of Technology. While LIU Post is located to the east in Brookville, it uses the Greenvale, NY 11548 ZIP Code and the Greenvale Post Office.

Until 1866, the community was known as "Cedar Swamp", and later known as "Bull's Head", until some point in the early 20th century; it has also been known historically as "North Roslyn".

While many residential areas in the hamlet were developed prior to the Second World War, the 1940s and 1950s saw the development of the area adjacent to the Roslyn Cemetery and the Long Island Rail Road tracks (including Park Avenue and Wellington Road).

Geography 

According to the United States Census Bureau, the CDP has a total area of , all land.

Greenvale is located mainly within the Town of North Hempstead, while a small portion is located in the Town of Oyster Bay.

Drainage 
According to the United States Geological Survey and the United States Environmental Protection Agency, Greenvale is located within the Hempstead Harbor Watershed, which itself is located within the larger Long Island Sound/Atlantic Ocean Watershed.

Demographics

As of the census of 2000, there were 2,231 people, 362 households, and 254 families residing in the CDP. The population density was . There were 372 housing units at an average density of . The racial makeup of the CDP was 66.11% White, 12.73% African American, 0.36% Native American, 10.49% Asian, 0.13% Pacific Islander, 7.08% from other races, and 3.09% from two or more races. Hispanic or Latino of any race were 13.09% of the population.

There were 362 households, out of which 32.6% had children under the age of 18 living with them, 58.8% were married couples living together, 8.6% had a female householder with no husband present, and 29.8% were non-families. 24.6% of all households were made up of individuals, and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.22.

In the CDP, the population was spread out, with 10.0% under the age of 18, 55.4% from 18 to 24, 16.8% from 25 to 44, 11.7% from 45 to 64, and 6.1% who were 65 years of age or older. The median age was 22 years. For every 100 females, there were 79.9 males. For every 100 females age 18 and over, there were 77.1 males.

The median income for a household in the CDP was $59,500, and the median income for a family was $80,292. Males had a median income of $52,639 versus $30,000 for females. The per capita income for the CDP was $22,009. About 4.3% of families and 4.4% of the population were below the poverty line, including none of those under the age of eighteen or sixty-five or over.

Government

Town representation 
As Greenvale is an unincorporated area within the towns of North Hempstead and Oyster Bay, it is directly governed by the two towns; the parts of the hamlet within the Town of North Hempstead are governed directly by the Town of North Hempstead's government in Manhasset, while the parts of the hamlet in the Town of Oyster Bay are governed directly by the Town of Oyster Bay's government in Oyster Bay.

The parts of Greenvale in the Town of North Hempstead are located in its 2nd council district, which as of July 2023 is represented on the North Hempstead Town Council by Peter J. Zuckerman (D–East Hills).

Representation in higher government

Nassau County representation 
Greenvale is located in Nassau County's 18th Legislative district, which as of July 2023 is represented in the Nassau County Legislature by Joshua A. Lafazan (D–Woodbury).

New York State representation

New York State Assembly 
Greenvale is split between the New York State Assembly's 13th and 15th State Assembly districts, which as of July 2023 are represented by Charles D. Lavine (D–Glen Cove) and Jacob Ryan Blumencranz (R–Oyster Bay), respectively.

New York State Senate 
Greenvale is located within the New York State Senate's 7th State Senate district, which as of July 2023 is represented in the New York State Senate by Jack M. Martins (R–Old Westbury).

Federal representation

United States Congress 
Greenvale is located within New York's 3rd congressional district, which as of July 2023 is represented in the United States Congress by George A. Santos (R).

United States Senate 
Like the rest of New York, Greenvale is represented in the United States Senate by Charles Schumer (D) and Kirsten Gillibrand (D).

Education

Schools

School districts 
Greenvale is split between the Roslyn Union Free School District and North Shore Central School District. Students who reside in Greenvale and attend public school will attend one of these two districts depending on where they live within the hamlet.

Most of the hamlet is within the Roslyn School District; the school district boundary between the Roslyn UFSD and the North Shore CSD within Greenvale corresponds with the North Hempstead–Oyster Bay town line.

Nassau BOCES facility 

The Nassau Board of Cooperative Education Services (BOCES)' Iris Wolfson High School is located within the hamlet, in the Roslyn Union Free School District's former North Roslyn School.

Library districts 
Greenvale is served by Roslyn's library district and by the Gold Coast Library District. The boundaries of the library districts correspond with the school district boundaries; Roslyn's library district (served by the Bryant Library in Roslyn) serves the parts of Greenvale in the Roslyn Union Free School District and the Gold Coast Library District (served by the Gold Coast Public Library in Glen Head) serves the parts of Greenvale in the North Shore Central School District.

Infrastructure

Transportation 
One state-owned road travels through (and directly serves) Greenvale: Northern Boulevard (New York State Route 25A).

Other major roads which are located within the hamlet include Glen Cove Road (CR 1) and Town Path.

Rail 
The Greenvale station on the Long Island Rail Road's Oyster Bay Branch is partially located within the hamlet; the station is located directly on the Greenvale–Roslyn Harbor border.

Bus 

Greenvale is served by the n20H and n27 bus routes, which are operated by Nassau Inter-County Express (NICE). The n20H travels west-east along Northern Boulevard, while the n27 travels north-south along Glen Cove Road.

Utility services

Natural gas 
National Grid provides natural gas to homes and businesses that are hooked up to natural gas lines in Greenvale.

Power 
PSEG Long Island provides power to all homes and businesses within Greenvale.

Sewage 
Greenvale is not connected to a sanitary sewer system. As such, all homes and businesses in Greenvale rely on cesspools and septic systems.

Trash collection 
Trash collection services in Greenvale are provided by Meadow Carting, under contract to the Roslyn Garbage District. The hamlet, in its entirety, is located within the boundaries of (and is thus served by) the Roslyn Garbage District.

Water 
Greenvale is located within the boundaries of (and is thus served by) the Jericho Water District and the Roslyn Water District. The Jericho Water District serves the portions of the hamlet in the Town of Oyster Bay, while the Roslyn Water District serves the portions of the hamlet in the Town of North Hempstead.

Landmarks 
Greenvale is the site of the historic Roslyn East Gate Toll House, a former toll house for the former North Hempstead Turnpike, which has been listed on the National Register of Historic Places since August 16, 1977.

As aforementioned, the historic Roslyn Cemetery is also located within the hamlet, and is listed on the National Register of Historic Places, as well.

Notable person 

 Michael Grunwald – Writer and journalist; raised in Greenvale.

References

Town of North Hempstead, New York
Oyster Bay (town), New York
Census-designated places in New York (state)
Hamlets in New York (state)
Census-designated places in Nassau County, New York
Hamlets in Nassau County, New York