Amagansett /ˌæməˈɡænsət/ is a census-designated place that roughly corresponds to the hamlet by the same name in the Town of East Hampton in Suffolk County, New York, United States, on the South Shore of Long Island.

Unlike the rest of the Hamptons, Amagansett was initially settled by the Baker, Conklin, and Barnes families, descendants of English settlers, and the Dutch brothers Abraham and Jacob Schellinger, the sons of a New Amsterdam merchant who moved to East Hampton between 1680 and 1690 after the English took over New Amsterdam.

[3] During Operation Pastorius, a failed Nazi attack on the United States in June 1942, during World War II, a submarine dropped off four German spies on Atlantic Avenue beach in Amagansett, where they made their way to the village's Long Island Rail Road station and boarded a train for New York.

The Coast Guard barracks are now part of the East Hampton Town Marine Museum, which includes exhibits from the town's maritime history, including whaling relics and a cannon from the American Revolution ship HMS Culloden, which ran aground at Montauk.

In 1998 President Bill Clinton, who was vacationing in East Hampton, gave a Saturday radio address from the Amagansett Fire House.

Amagansett includes a section of Further Lane, which is a block from the ocean, and has one of East Hampton's biggest collections of mansions.

[5] Many houses and other buildings from the 19th and even 18th century still stand in Amagansett, Montauk, the Hamptons, and other Long Island communities.

[7] Amagansett is a popular resort location where many famous people have resided in or owned second homes, including Paul McCartney, Scarlett Johansson, Kathleen Turner, James Frey, Billy Joel, Jerry Seinfeld, Sharyn Alfonsi , Harvey Weinstein, Christie Brinkley, Diane Sawyer, Gwyneth Paltrow and Chris Martin, Liev Schreiber and Naomi Watts, Alec Baldwin, Sarah Jessica Parker and Matthew Broderick, Peter Mayle, Jann Wenner, Suzanne Vega, Howard Stern, Lorne Michaels, Bill Clinton and Hillary Clinton, Shane McMahon, Randy Lerner, Andy Cohen, Babs Simpson,[9]Mitch Kupchak, and Larry Gagosian.

Perhaps the first wave of "summer people" was the "Devon Colony", founded in the late 19th century by executives of the Procter & Gamble company.