Elizabeth Francis, the oldest person in US, died peacefully on October 22 aged 115. As per reports, now a 114-year-old woman named Naomi Whitehead is the world's seventh-oldest person and the oldest person in US. According to Gerontology Research Group and LongeviQuest, Whitehead is last living American born in 1910. Francis attributed her longevity to abstaining from alcohol and smoking.