William Sloane Coffin Sr. (April 15, 1879 – December 16, 1933) was an American businessman. He was a director, and later vice-president of W. & J. Sloane Company, his family's business, which was founded by his grandfather, William Sloane, from Kilmarnock, Scotland. He became president of the board of trustees of the Metropolitan Museum of Art, and founded the Hearth and Home Corporation to provide housing in downtown Manhattan, New York City.