which presidents have the highest iqs?
President George W. Bush rated the lowest of all the Republicans with an IQ of 91. The six Democratic presidents of the past 50 years had an average IQ of 156, with President Clinton having the highest IQ, at 182. President Lyndon B. Johnson was rated the lowest of all the Democrats with an IQ of 126. No president other than Carter [D] has released his actual IQ (176).
The 15 smartest US presidents of all time. In 2006, University of California at Davis psychology professor Dean Simonton completed a comprehensive study examining the intellectual brilliance of 42 US presidents.