Killenworth

Killenworth
Rear of Killenworth around 1915, showing the swimming pool
General information
Type	Mansion
Architectural style	Tudor revival
Town or city	Glen Cove, New York
Country	United States
Coordinates	40°53′01″N 73°38′05″W / 40.8836°N 73.6346°W / 40.8836; -73.6346
Current tenants	Russia
Opened	1912
Design and construction
Other designers	Trowbridge and Ackerman

Killenworth is a historic mansion in Glen Cove, New York constructed for George Dupont Pratt in 1912. It was purchased by the Soviet Union in 1946 to become the country retreat of the Soviet, and later Russian, delegation to the United Nations. In the 1980s the property was subject to allegations it was being used for espionage. There has been a long-standing conflict with the City of Glen Cove over its tax status.