Sagaponack is a village in the Town of Southampton in Suffolk County, New York, United States. The village incorporated on September 2, 2005, in the wake of the failed attempt by Dunehampton, New York to incorporate. Dunehampton's incorporation would have blocked Sagaponack from Atlantic Ocean beaches. The villages are seeking to address various beach issues including erosion arising from groynes at Georgica Pond in East Hampton village.
The population of Sagaponack village at the 2010 census was 313. Prior to its incorporation, Sagaponack was a census-designated place, with a population at the 2000 census of 582 for an area 70% greater than that of the current village.
The Sagaponack ZIP Code (11962) was listed as the most expensive in the United States in 2009; the median home sale price was $4,421,458, according to Zillow.com. Nearby Watermill (11976) was listed sixth with $2,238,676, and Bridgehampton (11932) was listed eighth with $2,081,717.
The name Sagaponack comes from the Shinnecock Indian Nation word for "land of the big ground nuts", in reference to the Ground Nut (Apios americana). A common misconception is that the name referred to potatoes which were farmed until late in the 20th century. Many of the huge estates in the village were built on potato fields. Its first settler was Josiah Stanborough in 1656. The village was originally called Sagg.
Sag Harbor, just north of Sagaponack, is believed to have derived its name from the village. West of Sagaponack is a place that the Indians called Mecox, now a hamlet on the west side of Sagaponack Lake in the town of Bridgehampton.