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.