What Is the Highest IQ Recorded and Who Holds It
The highest IQ recorded in widely reported public cases is 228, attributed to Marilyn vos Savant, who was listed in the Guinness World Records for the highest IQ score. The score was based on a standardized intelligence test administered during her childhood, and her name remains a common reference in discussions of extreme IQ performance. For context on how intelligence is measured at the highest levels, you can refer to the structure of modern IQ testing on the Mensa International site Mensa International IQ Testing.
Other individuals are often mentioned in high-IQ discussions, such as Christopher Hirata, who reportedly scored 225 on an IQ test, and Terence Tao, a mathematician with an estimated IQ between 220 and 230. These figures come from public profiles and media reports rather than a single official global registry, so they are treated as estimates rather than formally certified records.
How IQ Scores Are Measured and What the Numbers Mean
Standardized Testing and Score Scaling
IQ tests are designed so that the average score is set at 100, with most people falling between 85 and 115. Scores above 130 are typically considered highly gifted, while scores above 160 are often described as profoundly gifted. The exact highest IQ recorded depends on the test used, the age of the test-taker, and the norms applied by the testing organization.
Common tests used for high-range measurement include the Stanford-Binet Intelligence Scales, the Wechsler Adult Intelligence Scale, and the Cattell Culture Fair Intelligence Test. Some organizations that track extreme scores, such as the Triple Nine Society and the Mega Society, publish qualifying score thresholds based on these tests, which can help contextualize claims about the highest IQ recorded.
Where to Find Reliable Data on IQ Records and High Intelligence
Public Sources and Institutional References
For verified information on intelligence testing and score interpretation, you can consult resources from the American Psychological Association or the official Mensa International site Mensa International IQ Testing. These organizations provide guidelines on how scores are derived and what different ranges indicate.
When evaluating claims about the highest IQ recorded, it is important to distinguish between formally administered tests and unverified online assessments. Media outlets and biographical profiles sometimes report extreme scores without full test documentation, so cross-referencing with established testing bodies and institutional pages such as the Stanford-Binet overview Stanford University helps ensure accuracy.