Least Intelligent Presidents? How could I pass that up?
How smart are U.S. presidents?
In a 2006 study, UC Davis professor Dean Simonton used historiometric methods to estimate each president’s IQ. Simonton analyzed information from each president’s biographies, speeches and writings that would indicate intelligence.
Simonton estimated four different IQ values for each president. At InsideGov, we averaged all four IQs to get our rankings of the 15 least intelligent presidents in U.S. history. Note that President Obama was not included in the study.
This list is by no means definitive, but it should give a general overview of each president’s relative intelligence.
The bottom five, in order, are:
- Ulysses S. Grant – 120
- James Monroe – 124.3
- Warren G. Harding – 124.3
- George W. Bush – 124.88
- Andrew Johnson – 125.65