Chappaqua is a hamlet located in the town of New Castle, Westchester County, New York, United States. It is situated approximately 35 miles north of New York City. Chappaqua is known for its beautiful residential neighborhoods and charming downtown area. The hamlet is home to several historic sites, including the Horace Greeley House, which was built in 1852 and is listed on the National Register of Historic Places. Chappaqua is also home to several parks and recreational areas, including the Gedney Park, which offers hiking trails, sports fields, and picnic areas. The hamlet is served by the Metro-North Railroad, which provides convenient access to New York City and other areas of the Hudson Valley.