Necker Island (Hawaiian: Mokumanamana) is a small island in the Pacific Ocean, 8 miles (13 km) north of the Tropic of Cancer. It is part of the Northwestern Hawaiian Islands, located 155 miles (249 km) northwest of Nihoa and 430 miles (690 km) northwest of Honolulu, and is part of the Hawaiian Islands National Wildlife Refuge within the Northwestern Hawaiian Islands National Monument.
The United States Census Bureau reports its land area as 182,890 square meters, or 45.193 acres. The island is rocky with steep sides and has very little soil. Its highest elevation is 277 feet (84 m).
Few signs of long-term human habitation have been found. However, the island contains 33 stone shrines and stone artifacts much like those found in the main Hawaiian Islands. Because of this, many anthropologists believe that the island was a ceremonial and religious site. According to the myths and legends of the people of Kauai, which lies to the southeast, Necker Island was the last known refuge for a race of mythical "little people" called the Menehune. According to the legend, the Menehune settled on Necker after being chased off Kaua'i by the stronger Polynesians and subsequently built the various stone structures there. Visits to the island are said to have started a few hundred years after the main Hawaiian Islands were inhabited, and ended a few hundred years before European contact. French explorer Jean-François de La Pérouse was the first European to visit the island, in 1786. The island is named after Jacques Necker.