Who were the smartest U.S. presidents?

John F. Kennedy speaks at Rice University, September 12, 1962 Wikimedia Commons. In 2006, University of California at Davis psychology professor Dean Simonton completed a comprehensive study examining the "intellectual brilliance" of 42 US presidents. read more

In 2006, University of California at Davis psychology professor Dean Simonton completed a comprehensive study examining the"intellectual brilliance" of 42 US presidents. The top 15 who appear on this list were compiled by Libb Thims— an American engineer who compiles high IQ scores as a hobby — using the results of Simonton's study. read more

One way is by observing his behavior, and by that standard, Warren Harding, America’s 29th president, on the short list as America’s worst president, was hands down our dumbest Commander-in-Chief. read more

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