Greenridge-Arthur Williams House

Greenridge-Arthur Williams House is a historic mansion located at Roslyn Harbor in Nassau County, New York, United States. It is a large, $2 1/2$-story, Jacobethan Revival–style house constructed of concrete and faced in red brick. It features a steeply pitched slate roof with projecting bays, gables, dormers, and deep eaves. A 2-story gable-roofed Great Hall wing has a stone clad foundation and terminates in a five-sided bay to the north. Also on the property is a contributing former ice house.

It was added to the National Register of Historic Places in 1999.