Lynbrook is a village in Nassau County, New York, United States. The population was 19,427 at the 2010 census. The Incorporated Village of Lynbrook is inside the Town of Hempstead, neighboring Malverne to the north, Valley Stream to the west, Hewlett to the southwest, East Rockaway to the southeast, and Rockville Centre to the east. The Village of Lynbrook's current mayor is Alan Beach.
Lynbrook is part of New York's 4th congressional district, which is currently represented by Democrat Kathleen M. Rice. Lynbrook is also part of New York State Senate District 9. It is also part of the New York State 21st Assembly District, which is represented by Democrat Judy Griffin, who resides in Rockville Centre. Long Island Rail Road service to the New York City boroughs of Manhattan, Queens and Brooklyn is available at the Lynbrook station located off Sunrise Highway between Peninsula Boulevard and Broadway. There is also the Westwood station located off Whitehall Street that provides service to the New York City boroughs of Manhattan, Queens and Brooklyn.
The area currently known as Lynbrook had other names, including Rechquaakie (originally), Parson's Corners, and Bloomfield.