Who Has the Highest IQ Ever Recorded? The Complete List

Intro

Who has the highest IQ ever recorded? The most common answer would be Marilyn vos Savant, who was included in the Guinness World Records with an outstanding score of 228. Yet, when talking about the highest IQ ever, it is always easy to make things complicated because there are many famous individuals whose IQs have been calculated yet not tested, and, consequently, may be exaggerated.

The understanding of who has the highest IQ ever requires distinguishing proven facts from mere speculations.

Understanding IQ: What Do Scores Actually Mean?

Intelligence Quotient is intended to estimate some particular cognitive functions like logical thinking, visual perception, and decision-making. The average score is 100, while 85-115 is typical for the majority of people. A genius IQ score means having an IQ score of 140 or above to denote extraordinary intelligence and belonging to the percentage of geniuses.

Nevertheless, there is a change in the IQ from generation to generation. The validity of this claim can be proven through the Flynn effect, which refers to the gradual development of high IQ scores because of factors like nutrition, learning, and surroundings. Therefore, it is not sensible to compare IQ scores from various generations.

Alternatively, there are scholars who maintain that the IQ score is only one of the features of intelligence since there are many traits, including the ability to make wise decisions and emotional intelligence, that remain unexamined.

The Verified Record Holders

Marilyn vos Savant — Guinness World Record Holder

Marilyn vos Savant’s IQ is often referred to when talking about the highest IQ ever recorded. She got her record back in the '80s thanks to an IQ of 228.

Her case is special because not many cases of a high IQ have been proven with official results. Although she is considered the person with the highest IQ, it is hard to compare her results to modern test standards.  

William James Sidis — The Disputed Child Prodigy

One of the names that comes up when talking about the highest IQ in history is William James Sidis, whose IQ was supposedly recorded anywhere between 250 and 300. However, these estimates cannot be confirmed since there was no such standardized test done in those days.

As a result, William James Sidis' IQ can be considered an estimate, even though he showed incredible intellectual skills at such a young age. Indeed, his achievements are amazing but we have to consider the fact that there is nothing to confirm these estimations.

Terence Tao — Highest Verified Living Score

Terence Tao's IQ is one of the most talented people of our time. According to estimations, his IQ score falls somewhere around 225 to 230.

As far as IQ scores go, it can be claimed that Terence Tao is definitely among the top few verifiable cases of modern times. The reason why he might be called the smartest person alive is due to the fact that his achievements are not mythological.

Other Notable High-IQ Individuals

Some other notable individuals who have been mentioned when discussing IQs, although to different degrees of credibility, are:

• Christopher Hirata - said to score about 225 in one test during his youth.
• Kim Ung-Yong – alleged high IQ scores, although the verifiability is in question.
• Judit Polgar – not IQ-defined, yet exemplifies excellent cognitive performance.

The above examples highlight the significance of differentiating between IQ scores and cognitive ability.

Comparison Table: Verified vs. Estimated IQ Scores

Name	IQ Score	Status
Marilyn vos Savant	228	Verified
Terence Tao	~225–230	Verified/Estimated
William James Sidis	250–300	Estimated
Christopher Hirata	~225	Partially Verified
Kim Ung-Yong	~210	Disputed

The table reveals an important point: there have been many assumptions made regarding the highest IQ in history, but few facts have been based on standardized test results.

Does IQ Determine Success?

A high IQ may help someone excel in education and critical thinking, but it does not ensure success or happiness. Research by Mensa International and Psychology Today magazines repeatedly proves that perseverance, inquisitiveness, and sociability are as crucial as intelligence.

Moreover, it is not enough to be smart; one needs to know how to use one's intelligence wisely.

FAQ

What is the highest IQ ever documented?

The highest IQ belongs to Marilyn vos Savant, who is listed by the Guinness Book of Records as having scored 228 points.

How high is considered a genius IQ?

Any person whose IQ is 140 points and above can be considered a genius.

Is IQ capable of being enhanced?

While the actual IQ number does not increase, cognitive functions such as memory, concentration, and brain speed can be developed through practice.