Writer Marilyn vos Savant (born 1946) has an I.Q. of 228, the highest ever recorded.

Marilyn vos Savant's intelligence quotient (I.Q.) score of 228, the highest ever recorded, brought the St. Louis-born writer instant celebrity and earned her the sobriquet "the smartest person in the world." Although vos Savant's family was aware of her exceptionally high I.Q. scores on the Stanford-Binet test when she was 10 years old (she is also recognized as having the highest I.Q. score ever recorded by a child), her parents decided to withhold the information from the public in order to avoid commercial exploitation and assure her a normal childhood.

Bored with college, vos Savant left Washington University after two years and launched a career in stocks, real estate, and investment. Her real interest had always been in becoming a writer, but she realized that she first needed to establish a financial base...