In 2006, University of California at Davis psychology professor Dean Simonton completed a comprehensive study on the overall intelligence of 42 US presidents.
Based on those results, a list was created to show which commander-in-chief had the highest level of intelligence.
These are the top 16, and the list is pretty surprising.
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16. George Washington
Washington pursued two major interests throughout his life; western expansion and military arts. He became a lieutenant colonel in 1754, fighting his first battles during the French and Indian War. He lead American troops through the Revolutionary War and helped establish America as it’s own separate nation independent of Britain. The first President of the United States of America took his oath on April 30, 1789.
With his military intelligence included, his IQ is slightly above his projected 132.