#17 Thomas Jefferson – 160 IQ
Thomas Jefferson is best known for his contributions to the founding of the United States. But did you know he also had an IQ score of 160 – making him one of the smartest people of all time! He left a positive legacy as President by lowering taxes and helping with the founding of the United States of America. Interestingly enough, he was the third president and the third smartest person on our list!Advertisement