James A. Garfield – IQ 152.3

As the 20th president and the 10th smartest with an IQ of 152, James A. Garfield was a brilliant leader, whose term abruptly cut short when he tragically passed on after only six months in office. Despite his high intelligence, Garfield, unfortunately, didn’t get a chance to lay the foundations and implement the policies he’d set out to achieve.

James didn’t leave much in terms of a legacy, but it’s not every day that one gets to be elected the President of the most powerful nation in the world. That in itself is a great accomplishment!