The Town of Babylon is located in south western Suffolk County.

The Town of Brookhaven is located in central Suffolk County.

The Town of East Hampton is located in southeastern Suffolk County, New York, at the eastern end of the South Shore of Long Island. It is the easternmost town in the state of New York. At the time of the United States 2010 Census, it had a total population of 21,457.

The Town of Hempstead is located in western Nassau County, New York, occupying the southwestern part of the county, in the western half of Long Island. Twenty-two incorporated villages are completely or partially within the town. Hempstead's combined population was 759,757 at the 2010 Census, the majority of the population of the county and by far the most of any town in New York. Also, a village named Hempstead is within the Town.

The Town of Huntington is one of ten towns in Suffolk County, New York, United States. Founded in 1653, it is located on the north shore of Long Island in northwestern Suffolk County, with Long Island Sound to its north and Nassau County adjacent to the west. Huntington is part of the New York metropolitan area. As of the United States 2010 Census, the town population was 203,264.

The Town of Islip is located in south central Suffolk County. It is one of the ten towns of Suffolk County and one of the 5 western towns.

The Town of North Hempstead is located in western Nassau County. It is one of three towns in Nassau County, New York, USA. As of the 2010 census, the town population was 226,322.

The Town of Oyster Bay is easternmost of the three towns in Nassau County. Part of the New York metropolitan area, it is the only town in Nassau County that extends from the North Shore to the South Shore of Long Island. As of the 2010 census, the town population was 293,214.

Riverhead is a town within Suffolk County, New York, on the north shore of Long Island. As of the 2010 census, the population was 33,506. The town rests on the mouth of the Peconic River, from which it derives its name. Since 1727, Riverhead has been the county seat of Suffolk County. The smaller hamlet of Riverhead lies within it, and is the town's principal economic center. The town is 166 miles (267 km) southwest of Boston via the Orient Point-New London Ferry, and is 76 miles (123 km) northeast of New York City.

Shelter Island is a town and island at the eastern end of Long Island in the U.S. state of New York. It is part of Suffolk County, although it is separated from the rest of the county by water. The population was 2,392 at the 2010 census.

The Town of Smithtown is located in central Suffolk County.

The Town of Southampton is located in eastern Suffolk County.

The Town of Southold is located in north eastern Suffolk County.