Sarah DeRemer Knauss (née Clark; September 24, 1880 – December 30, 1999) was an American supercentenarian. She is the oldest person ever from the United States and, on April 16, 1998, became the world's oldest living person. She is the third-oldest verified person ever, living to the age of 119 years and 97 days. Her birthdate has been independently verified through numerous census and other records.
Source : Wikipedia