Sprawling over 128 square miles, Southampton is one of the county's ten townships.  Southampton is the largest and most heavily populated of the five East End Towns of Suffolk County.  The community borders Brookhaven on the west, East Hampton on the east, and the Great and Little Peconic bays and Rivertown on the north.  To the south are the great bays of Moriches, Shinnecock, and Mecox, the barrier beach island, and the Atlantic Ocean.  Incorporated villages in Southampton include Sag Harbor, North Haven, Quogue, Westhampton Beach, West Hampton Dunes, and Southampton Village.  Summer populations tend to swell and double in popular seasonal resort towns, and tourism and the vacation home industry underlines the economy.  The Shinnecock Canal, the heart of the Southampton Town summer resort area, provides a connecting waterway for vessels traveling from the Atlantic Ocean to the Great Peconic Bay.  Southampton's communities of Remsenburg, Speonk, Hampton Bays, Westhampton, Quiogue, Flanders, Riverside, Northampton, East Quogue, and part of Eastport lie on the west side of the Shinnecock Canal.  The communities of North Sea, Bridgehampton, Water Mill, Sagaponack, Noyac, Sag Harbor, Shinnecock Hills, Tuckahoe and the unincorporated area of Southampton lie on the east side.