The Elkins Estate is an American 42-acre (170,000 m2) estate located in Elkins Park, Montgomery County, Pennsylvania. The estate contains seven buildings, the most notable being Elstowe Manor and Chelten House, mansions designed by Horace Trumbauer. Elstowe Manor was built in 1898 at the location where "Needles", the former family summer home of William L. Elkins, had stood. Elkins, a Philadelphia businessman, was integral in the formation of the Pennsylvania Railroad Company and the Philadelphia Rapid Transit Company, the forerunner of SEPTA.