Question: who is the oldest living person in the united states
Answer: The Gerontology Research Group ( GRG ) , an organization that tracks supercentenarians and validates longevity claims , has validated claims of over 700 American supercentenarians and as of 15 July 2018 , lists six verified living American supercentenarians , the oldest of whom is Lessie Brown , born September 22 , 1904 , aged 113 years , 296 days .