On which New York island did pirate William Kidd reportedly bury treasure in 1699?

William Kidd reportedly buried treasure on Gardiners Island in 1699.

Gardiners Island lies off the eastern end of Long Island, New York, and was owned by the Gardiner family. According to the traditional account, Kidd stopped there while sailing toward New York after returning from the Indian Ocean. He allegedly asked proprietor John Gardiner to safeguard a chest containing gold, silver, and other valuables.

Colonial authorities later recovered the treasure and used the discovery as evidence against Kidd. The episode became one of the best-known stories associated with his trial, although many details come from later accounts and folklore rather than independently verified records.

Gardiners Island is not the same as Long Island: it is a separate island near its eastern tip. The buried treasure story also helped shape the enduring popular image of Kidd as a stereotypical treasure-burying pirate, even though historical evidence suggests that deliberate treasure burial was uncommon among pirates.