Glenwood Landing is a hamlet and census-designated place (CDP) in Nassau County, New York, United States. The population was 3,779 at the 2010 census. Glenwood Landing is mainly within the Town of Oyster Bay but a small section in the southwest corner is in theTown of North Hempstead. It is a part of the North Shore School District. According to the United States Census Bureau, the CDP has a total area of 1.0 square mile (2.6 km2), all land.