Glenwood Landing is a hamlet and census-designated place (CDP) in Nassau County, New York.

According to the United States Census Bureau, the CDP has a total area of 1.0 square mile (2.6 km2), all land.

As Glenwood Landing is an unincorporated hamlet, it is directly governed by the Towns of North Hempstead and Oyster Bay.

[6] The parts of Roslyn Harbor in the Town of North Hempstead are located in its 2nd council district, which as of March 2024 is represented on the North Hempstead Town Council by Edward Scott (R–Albertson).

[6][9][12] Glenwood Landing is located within New York's 3rd congressional district, which as of March 2024 is represented in the United States Congress by Thomas R. Suozzi (D–Glen Cove).

[6][13] Like the rest of New York, Roslyn Harbor is represented in the United States Senate by Charles Schumer (D) and Kirsten Gillibrand (D).