Seacliff or Sea Cliff or Sea Cliffe may refer to:
Places Australia Seacliff, South Australia, suburb of Adelaide Seacliff Park, South Australia, a suburb of Adelaide Sea Cliff Bridge, in Illawarra, New South Wales
New Zealand Seacliff, New Zealand, settlement in Otago, New Zealand Seacliff Lunatic Asylum, a former mental hospital near the settlement
United Kingdom Seacliff, a beach, estate and harbour near North Berwick, Scotland. Sea Cliffe, Ballure Road, Ramsey, Isle of Man, one of Isle of Man's Registered Buildings
United States Seacliff, California, a census-designated place near Aptos, California Seacliff State Beach, a California State Beach in Aptos, California Sea Cliff, California, a community in Ventura County Sea Cliff, San Francisco, California, a neighborhood in San Francisco County Sea Cliff, New York
Ship DSV Sea Cliff, U.S. Navy research deep submergence vehicle