Yorktown Heights is a census-designated place in the town of Yorktown in Westchester County, New York, United States. The population was 1,781 at the 2010 census. Yorktown Heights is in the town of Yorktown, New York, in northern Westchester County, 45 miles from New York City, with forty square miles of rolling hills, farmland, residential areas and light …Yorktown Heights is a census-designated place in the town of Yorktown in Westchester County, New York, United States. The population was 1,781 at the 2010 census. Yorktown Heights is in the town of Yorktown, New York, in northern Westchester County, 45 miles from New York City, with forty square miles of rolling hills, farmland, residential areas and light industry including the IBM Thomas J. Watson Research Center. First settled in 1683, Yorktown was of strategic importance during the American Revolution, with the Pines Bridge crossing of the Croton River guarded by the 1st Rhode Island Regiment, an integrated unit which included African Americans and Native Americans. Yorktown was incorporated in 1788 and named in commemoration of the Franco-American decisive victory at Yorktown, Virginia. The Yorktown Heights Railroad Station, which last had passenger service on the New York Central Railroad's Putnam Division in 1958, was added to the National Register of Historic Places in 1981.