Where Intellects Meet

The United Sigma Korea Society (USK Society or USK) is the exclusively intellectual society with IQ 180 S.D.16, as the first and the oldest high IQ society in South Korea, higher than the Mensa IQ 132 S.D. 16 and even higher than the Mega Society IQ 176 S.D.16.

With an international scope, USK is 3 sigma, 4 sigma, and 5 sigma umbrella society, which was founded in 2007 by Dr. Hankyung Lee, M.D.


“All men by nature desire to know.” by Aristotle

“The object of knowledge is what exists and its function to know about reality.” by Plato

“There is only one good, knowledge, and one evil, ignorance” by Socrates