Question: who was the richest man in america history?
Answer: William Weightman. Adjusted wealth*: $51.8 billion. ... , John D. Rockefeller. ... , Cornelius Vanderbilt. Adjusted wealth*: $205 billion., John Jacob Astor. Adjusted wealth*: $138 billion., Stephen Girard. Adjusted wealth*: $120 billion., Richard Mellon. Adjusted wealth*: $103 billion., Andrew Carnegie. ... , Stephen Van Rensselaer.