Hello how may I help you? I want to know who was the oldest person of all time? Would this be the oldest living person of all time or the oldest person of all time, period? Dead or alive. Jeanne Calment was the oldest living person in the world. She died at the age of 122 years old, 164 days. The oldest person alive today is Chiyo Miyako, who is currently alive at the age of 117 years old and 44 days. that''s interesting, when was her birthday? And which particular person are you referring to for this question? Jeanne Jeanne Calment was born on February 21st, 1875. That's wonderful thanks for telling me that! You're very welcome.