Sarah DeRemer Knauss (née "Clark"; September 24, 1880 – December 30, 1999) was an American supercentenarian, and the world's oldest living person between the death of Canadian woman Marie-Louise Meilleur on April 16, 1998, and her own death from natural causes at age 119 years, 97 days, and also along with Danish-born Americanman Christian Mortensen, who was almost two years younger and died just nine days after Meilleur, the last two living people born before 1884. During the last 40 days of her life, she was also the last living person born before 1885.