Glen Cove is a city in Nassau County, New York on the North Shore of Long Island. As of the United States 2000 Census, the city population was 26,622. Part of the early 20th century Gold Coast of the North Shore, Glen Cove has a diverse population. The Russian UN delegation owns the Killenworth estate, which it uses to house visitors and for weekend retreats.

Glen Cove was first settled as "Musketa Cove" in 1668 by Joseph Carpenter, brothers Nathaniel, Daniel and Robert Coles, and Nicholas Simkins on land purchased from the Matinecock Indians.

The City of Glen Cove is surrounded by the Town of Oyster Bay. The City of Glen Cove is totally autonomous from the town.