The Town of Mamaroneck includes the entire Village of Larchmont (one square mile), the Unincorporated Area (5.7 square miles which is not part of either village), and that part of the Village of Mamaroneck west of the Mamaroneck River bordering Rye Neck (2.3 square miles). Both the incorporated villages and the unincorporated Town are self-governing and define the Town as a political and governmental subdivision of the State of New York.

The Town provides direct municipal services – police, fire, sanitation, highway among others – to the residents of the Unincorporated area, and recreation, property assessment services and election supervision to both villages.

Today, the Town of Mamaroneck, with its beautiful Long Island Sound waterfront and easy access to highways, airports and Metro North train service to New York City and Stamford is a prime suburban residential community.