Mamaroneck (/məˈmærənɛk/ mə-MAIR-ə-nek), is a town in Westchester County, New York, United States.

Legally, the unincorporated section and the villages constitute the town as a political and governmental subdivision of New York State.

The area that is now the town in Mamaroneck was purchased from the Weckquaesgeek Wappaquewam on behalf of Manhatahan "another proprietors" and "by the consent of the other Indians," on September 23, 1661, by an Englishman named John Richbell who was a resident of Oyster Bay LI.

This three-part division occurred in the 1890s to meet the growing demand for municipal services that the town could not provide.

Larchmont Manor, with its beaches along Long Island Sound, had become well known as a summer resort for families from New York City, and people were beginning to live there year-round.

As the population of these two areas expanded, the residents soon found the need for adequate water supply, sewage disposal, garbage collection, sidewalks, and improved street lighting, police and fire protection.

In 1891, residents of Larchmont Manor obtained a charter from the Legislature under which they incorporated their section of town into a village.

"[6] A former employee of D.W. Griffith's studio on Orienta, said "“In those days we'd get people like Mary Pickford, Douglas Fairbanks and Charlie Chaplin visiting.

I'm not fooling when I say Mamaroneck was more exciting than Hollywood back then.”[6] After World War I, the unincorporated section of the town grew sufficiently that the State Legislature granted the town government the local powers to provide local services it had previously granted to the villages by charter.

The golf club has been host to a number of professional tournaments, including the 1997 PGA Championship and the 1929, 1959, 1974, 1984, 2006, and 2020 U.S. Open.

[12] The town is home to Walter's Hot Dog Stand, a Westchester County landmark.