Mensa

With more than 57,000 members, American Mensa is the largest national Mensa operating under the auspices of Mensa International, Ltd. Members of American Mensa range in age from 2 to 102, and share the common trait of high intelligence. To qualify for Mensa, you must score in the top 2 percent of the general population on an accepted standardized intelligence test. Connect with Mensa here.