Rick Rosner: IQ 192–198Rick Rosner has taken over 30 IQ tests, demonstrating his IQ is between 192 and 198, depending on how the tests determine their scores. Before the allegedly second-smartest man in the world became a TV writer, he served as a bouncer, stripper, and nude model.
Evangelos Katsioulis: IQ 198With a score of 198, Evangelos Katsioulis, MD, MSc, MA, Ph.D., has the highest IQ in the world as per World Genius Directory. This Greek psychiatrist holds degrees in medical research technology and philosophy.
Nathan Leopold: IQ 200The notorious Nathan Leopold had an IQ of 200 and spoke 9 languages by age 18, but he didn’t utilize his intelligence for the greater good.
Ainan Cawley: IQ 263This former Irish child genius, who’s now 21, has an IQ of 263. At 8 years old, he was already taking third-year chemistry courses at Singapore Polytechnic, and by the time he was 9, he’d learned the first 518 decimal places of pi.
Johann Goethe: IQ 210–225 -When American electrochemical engineer Libb Thims set out to discover the person with the highest IQ in history, he used a methodology that indicates their IQ based on how much they achieved every 10 years.
Sho Yano: IQ 200 American physician Sho Yano began college at age nine and earned an MD and Ph.D. by age 21. He began composing music when he was 4, but he’s put his emphasis on child neurology.
Christopher Langan: IQ 174–210 Finland completes the list with a score of 109.14 and the reason for its success is based on a robust education system and highly trained teachers who make Finnish people the most productive workers on the planet.
Jacob Barnett: IQ 170 At two years old, Jacob Barnett was diagnosed with moderate to severe autism, and doctors implied he’d never learn to tie his own shoes. He’s learned that task.
Marnen Laibow-Koser: IQ 268When Marnen Laibow-Koser was tested as a kid, he was given a projected IQ of 268. Now, he’s a songwriter and musician living in Randolph, Massachusetts. He has been both playing and composing music since the age of 3.
Adragon De Mello: IQ 400 In 1988, when Adragon De Mello graduated from the University of California with a degree in computational mathematics at the age of 11. At that time, he was the youngest college graduate in the United States.
Leonardo da Vinci: IQ 180–220While IQ tests weren’t available when Leonardo da Vinci was, it is now calculated that his score would have been between 180 and 220.