20 US Presidents with Lowest IQ

William McKinle

20. William McKinley

It’s funny how we start our list of the least intelligent presidents with William McKinley, who’s IQ is 143.4, which is definitely considered to be above average. We’re not trying to say that America has had the most intelligent presidents in the world, only that everyone who got to this position has had some intellectual skills that led him to it.

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