Jacob Barnett with IQ 170; Jacob Barnett was diagnosed with moderate to severe autism at two years old. American child prodigy finished grades 6 through 12 in less than a year, then went to college at age 10.
Judit Polgar with IQ 170; The Hungarian chess master is considered the best female chess player of all time. She’s reported to have an IQ of 170.
Rick Rosner with IQ 192–198; Rick Rosner has taken more than 30 IQ tests, revealing his IQ is between 192 and 198, depending on how the tests define their scores
Evangelos Katsioulis with IQ 198; With a score of 198, Evangelos Katsioulis, MD, MSc, MA, PhD, has the highest tested IQ in the world, according to the World Genius Directory
Sho Yano with IQ 200; American physician Sho Yano started college at age nine and earned an MD and PhD by the time he was 21
Nathan Leopold with IQ 200; The infamous Nathan Leopold had an IQ of 200 and spoke nine languages by age 18, but he didn’t use his intelligence for the greater good.
Marilyn vos Savant with IQ 228; When Marilyn vos Savant was 10 years old, an adult-level Stanford-Binet test revealed she had an IQ of 228, which later landed her a Guinness World Record
Ainan Cawley with IQ 263: This former Irish child genius, who’s now 21, is projected to have an IQ of 263.
Johann Goethe with IQ 210–225: In a study, German Renaissance man Johann Goethe was the person with the highest IQ of all time, with a score ranging from 210 to 225.