Mamaroneck, is a town in Westchester County, New York, United States. The population was 31,758 at the 2020 United States census over 29,156 at the 2010 census. There are two villages contained within the town: Larchmont and the Village of Mamaroneck. The majority of the town's land area is not within either village, constituting an unincorporated area, although a majority of the population lives within the villages.