Florence Knapp

Florence Knapp (October 10, 1873 – January 11, 1988) was, for the last two weeks of her life, recognized by the Guinness Book of World Records as the oldest person in the world.

Born in Lansdale, Pennsylvania, she lived in nearby Montgomery Square much of her life and came from a large and long-lived family, eight of her siblings dying in their 80s and 90s and one sister reaching age 108.

By October 1987, when she was honored by the Pennsylvania legislature, she was recognized by Guinness as the oldest person in the United States, and the death of Anna Eliza Williams on December 27, 1987, meant that Knapp became the oldest verified recognized living person. Her death, aged 114 years 93 days, just 15 days after meant that she never appeared in a Guinness Book as the oldest living person.

Her death caused some confusion as to who her successor was, with Guinness recognition and press publicity alighting first on Orpha Nusbaum (August 1875 – March 1988), who died before the 1989 edition's deadline, then Birdie May Vogt (August 1876 – July 1989), who appeared in the 1989 edition's main text, then Jeanne Calment, mentioned in the addenda section, and finally in November 1988 on Carrie C. White, whose claim to birth in November 1874 was accepted. However, with recent census research calling White's authentication into question, Calment may very well have been Florence Knapp's actual immediate successor.

Knapp is listed as one of the 90 longest lived people ever; her lifespan is tied with that of Elena Slough.