Suffolk County is the easternmost county in New York State and is divided into 10 towns: Babylon, Brookhaven, East Hampton, Huntington, Islip, Riverhead (county seat), Shelter Island, Smithtown, Southampton and Southold.

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Main Industries: Suffolk County is home to the scientific innovations at Brookhaven National Lab, Stony Brook University and the high-tech Route 110 corridor. Traditional family farms and wineries in Suffolk County's rural East End make it the biggest agricultural county in New York State.

Education: Suffolk County is home to numerous colleges and universities, both public and private.

Land: Suffolk County occupies the central and eastern part of Long Island, in the extreme southeast of New York State. The eastern end of the county splits into two peninsulas, known as the North Fork and the South Fork. The county is surrounded by water on three sides, including the Atlantic Ocean and Long Island Sound, with 980 miles (1,580 km) of coastline. The eastern end contains large bays.

Suffolk County Executive - Steve Bellone

County Legislature Presiding Officer - Kevin McCaffrey

• Babylon, Town of
  • Amityville, Village of
  • Babylon, Village of
  • Lindenhurst, Village of
• Brookhaven, Town of
  • Belle Terre, Village of
  • Bellport, Village of
  • Lake Grove, Village of
  • Old Field, Village of
  • Patchogue, Village of
  • Poquott, Village of
  • Port Jefferson, Village of
  • Shoreham, Village of
• East Hampton, Town of
  • East Hampton, Village of
  • Sag Harbor, Village of (shared with the Town of Southampton)
• Huntington, Town of
  • Asharoken, Village of
  • Huntington Bay, Village of
  • Lloyd Harbor, Village of
  • Northport, Village of
• Islip, Town of
  • Brightwaters, Village of
  • Islandia, Village of
  • Ocean Beach, Village of
  • Saltaire, Village of
• Riverhead, Town of
• Shelter Island, Town of
  • Dering Harbor, Village of
• Smithtown, Town of
  • Head of the Harbor, Village of
  • Nissequogue, Village of
  • Village of the Branch, Village of
• Southampton, Town of
  • North Haven, Village of
  • Quogue, Village of
  • Sagaponack, Village of
  • Southampton, Village of
  • Westhampton Beach, Village of
  • West Hampton Dunes, Village of
• Southold, Town of
  • Greenport, Village of