Manhasset is a hamlet in Nassau County, New York.

Manhasset may also refer to:

• Manhasset Bay, a bay of Long Island
• Manhasset Secondary School
• The Manhasset, a building in Manhattan, New York

• Manhasset negotiations, diplomatic talks between Morocco and the Saharawi liberation movement
• Manhasset Stable, a thoroughbred horse-racing stable, now defunct