Van Cortlandt Manor is a house and property located by the confluence of the Croton and Hudson Rivers located in the village of Croton-On-Hudson in Westchester County, New York. The stone and brick manor house is now a National Historic Landmark. It is on South Riverside Avenue.
Originally, it was an 86,000-acre (35,000 ha) tract granted as a Patent to Stephanus Van Cortlandt in 1697 by King William III. The manor house was built sometime before 1732 but was not any owner's principal residence until a grandson, Pierre Van Cortlandt, moved there in 1749. At that time the manor house was on a 1,000-acre (405 ha) portion of the original tract. The house remained in Van Cortlandt family ownership until 1945. In 1953, John D. Rockefeller purchased it and began a restoration. The restored manor house was designated as a National Historic Landmark in 1961.