Who holds the highest IQ in the World?

Answer 1

The Guinness Book of World Records stopped listing the highest IQ in 1989 (along with many other world records).

IQ testing is an inexact science with many different society tests and standards.

But this comes from Wikipedia:
It is generally acknowledged that Marilyn vos Savant has an extremely high IQ, and she has belonged to Mensa, Prometheus, and other high-IQ societies.
However, there is much confusion over its actual value, with different data and calculations yielding different numbers: 167+, 186, 218, 228, and 230.
The measurement of extremely high IQs is an inexact science, subject to problems including small sample sizes (because so few people have IQs at this level), ceiling bumping (because many tests are not designed to measure such high IQs), and a fat tail (because there seem to be more high IQs than a normal distribution would predict), as well as to the controversy over IQ in general.

Marilyn was listed in the 1986 to 1989 editions of the Guinness Book of World Records under "Highest IQ".
Subsequent editions do not include this category, and her column now reports that she is listed in the Guinness Hall of Fame.
http://en.wikipedia.org/wiki/Marilyn_vos_Savant#IQ

Link below is to a list of Mensa members:
http://en.wikipedia.org/wiki/Category:Members_of_Mensa

Answer 2

According to Guiness World Book of Records, it's Marilyn vos Savant, who is, of all things, an advice columnist.

This is also corroborated here: http://en.wikipedia.org/wiki/Marilyn_vos_Savant

Answer 3

jim raymond, mega genius title ;)

Answer 4

Not me I guess!