Mensa is the world's oldest and largest high-IQ society, welcoming individuals who score in the top 2% of the population on a standardized intelligence test. This comprehensive guide covers Mensa history, membership requirements, the local-group connection, and what to know about testing and prior evidence.
Last Updated: August 2026
From its founding in 1946 to today – the story of the world's premier high-IQ society.
Complete guide to accepted tests and score requirements for Mensa membership.
How local-group coverage works and what the regional Mensa community may offer.
Full list of standardized tests accepted by Mensa for membership qualification.
What to expect during the Mensa Admission Test and how to prepare.
Book your Mensa admission test or IQ assessment with a licensed psychologist locally today.
Mensa was founded in England in 1946 by Roland Berrill and Dr. Lancelot Ware. The name comes from the Latin word for “table,” reflecting the idea of members meeting as equals. Membership is based on qualifying performance on an accepted standardized intelligence test.
The organization expanded internationally and developed national groups, local chapters, publications, scholarships, gifted-youth resources, special-interest groups, and social events. American Mensa is the U.S. national organization.
Gilbert is served by Greater Phoenix Mensa, a local group of American Mensa. The chapter maintains information about scheduled and private testing, prior-evidence review, gifted-youth resources, scholarships, social events and member activities across the metropolitan area.
To qualify for Mensa, you must score at or above the 98th percentile on an approved standardized intelligence test. This means performing better than 98 out of every 100 people who take the same test.
Note that different tests use different standard deviations, which is why the qualifying scores vary. The consistent requirement is the 98th percentile.
American Mensa accepts qualifying evidence from many standardized tests under version-specific, score-specific, and documentation rules. Candidates should use the current official accepted-test list and prior-evidence instructions.
There are two primary pathways to Mensa membership:
American Mensa offers supervised admission-testing options through authorized arrangements. Local and regional availability changes, so candidates should verify the current location, age rules, cost, and registration process directly. Key details:
The Mensa Admission Test is specifically designed for admission to Mensa and does not provide a detailed IQ score or report. You will only be notified whether you qualified for membership. If you want a detailed IQ report with index scores, you should take a professionally administered test like WAIS-IV or SB-5 with a licensed psychologist.
Mensa was founded in 1946 in Oxford, England by Roland Berrill and Dr. Lancelot Ware. The name comes from the Latin word for "table," symbolizing a round-table society where all members are equal. Today, Mensa has over 150,000 members in more than 100 countries. American Mensa has over 50,000 members.
The requirement is scoring at or above the 98th percentile on an approved intelligence test. This translates to:
No authoritative city-specific membership total is published. Current local-group figures should be obtained from American Mensa or Greater Phoenix Mensa rather than estimated from population.
The Mensa Admission Test takes 1-2 hours total, including check-in and instructions. The two test batteries are timed and typically run between 20-25 minutes each.
Admission-test fees, private testing fees, and annual membership dues can change. Verify current costs directly with American Mensa and request a written fee estimate from any psychologist before scheduling.
Some historical scores may qualify as prior evidence, but accepted tests, dates, score formats, and documentation rules vary. Submit official records to American Mensa for a current eligibility determination.
No. Mensa does not accept online tests for admission. The test must be administered in person by a qualified proctor in a supervised environment. This includes the Mensa Admission Test and any prior evidence you submit.
Yes. Children can qualify for Mensa by scoring at the 98th percentile on an age-normed test. Parents can submit a psychologist's report directly to American Mensa. There is also a gifted youth program for younger members.
The Mensa Admission Test is designed only to determine if you qualify for membership and does not provide a detailed score report. Professional IQ testing (WAIS-IV, SB-5) provides a comprehensive report with Full Scale IQ, index scores, strengths, and weaknesses. Professional testing is better if you need a detailed analysis for school, career, or clinical purposes.
Mensa is primarily a social organization that provides community for people with high IQs. Activities include social events, discussion groups, lectures, game nights, and special interest groups. Mensa also supports gifted education initiatives, scholarships, and research into intelligence.