George W. Bush – 138.5
George W. Bush is the 43rd President of the United States, and he served as Commander-in-Chief during the attacks on the Twin Towers on September 11, 2001. He was Texas governor for five years before campaigning for president in 2000. In Florida, he received barely 0.5% of the popular vote, and the election resulted in a lengthy recount of the votes. Despite losing the popular vote, Bush was eventually declared president after winning the electoral vote. George W. Bush, with an IQ of 138.5, is another president with a lower-than-average IQ.