Plandome is a village in the Town of North Hempstead in Nassau County, on the North Shore of Long Island, in New York, United States. It is considered part of the Greater Manhasset area, which is anchored by Manhasset. The population was 1,349 at the 2010 census. The Incorporated Village of Plandome was ranked fifth on Forbes' 10 most affluent U.S. communities list in 2009.