Mamaroneck is a town in Westchester County, New York, United States.The population was 29,156 at the 2010 census.
The area that is now the town in Mamaroneck was purchased from Native American Chief Wappaquewam and his brother Manhatahan by an Englishman named John Richbell in 1661. The New York Legislature created Mamaroneck as a town on March 7, 1788. The Town of Mamaroneck is divided into three parts: the Village of Larchmont, an unincorporated area, and the Village of Mamaroneck, the rest of that village being in the town of Rye. This three-part division occurred in the 1890s to meet the growing demand for municipal services that the town could not provide. By definition at the time, a town could only provide basic government functions such as organizing and supervising elections, administering judicial functions, and constructing and maintaining highways.