Siasconset is a census-designated place (CDP) at the eastern end of Nantucket Island, Massachusetts, United States with an elevation of 52 feet (16 m), and a population of 205 at the 2010 census.

The core of Auld Lang Syne, one of the older fishing shacks, is believed to date from the 1670s, potentially making it one of the oldest houses on Nantucket.

In 1877 Edward Underhill from Wolcott, New York, bought land in the village, and constructed new cottages in the fashion of the original fishing shacks, and then rented them to summer tourists before they were sold after his death.

[5] In the early 20th century, Sconset was a summer retreat for an actor's colony which included Digby Bell, George Fawcett, Joseph Jefferson, Charles Penrose, Hassard Short, William H. Thompson and his wife Isabel Irving, DeWolf Hopper, Frank Gillmore and his daughters Ruth and Margalo Gillmore, among others.

Bill Belichick, former coach of the New England Patriots football team, has lived in Siasconset in the NFL off-season since 1979 and owns several properties in the town with a combined value of over $10 million.