American Mensa: Membership, Test and Requirements
If you are in the United States and curious about Mensa, the organisation you are actually dealing with is American Mensa — the national chapter that runs testing, membership, and events across the country. It is the largest of all national Mensa groups, and its rules are specific enough that it helps to know them before you apply.
The requirement is the same as everywhere in Mensa: a score in the top 2% of the population. What is US-specific is how you prove it, what testing costs, and which prior scores American Mensa will accept, as of 2026.
What is American Mensa?
American Mensa is the US national chapter of Mensa International, with roughly 50,000 members spread across dozens of local groups. It organises the American admission testing programme, publishes the Mensa Bulletin, and runs local groups, regional gatherings, and the large Annual Gathering. Like all of Mensa, its single entry requirement is scoring at or above the 98th percentile on an accepted intelligence test — no interview, no essays, no professional achievements required. That one clean rule is the whole point of the organisation, and it is the same standard whether you test in California or Maine.
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Two ways to qualify
You can join American Mensa by taking its own test or by sending evidence of a qualifying score you already hold.
| Route | What it involves | Notes |
|---|---|---|
| American Mensa Admission Test | A supervised, proctored battery of two tests | Minimum age 14; scoring in the top 2% on either test qualifies |
| Prior evidence | Submit a qualifying score from an accepted test | Reviewed for a small fee; useful if you were tested before |
The percentile is what counts. On the Wechsler scale that top-2% line is an IQ of 130 (SD 15); on Stanford-Binet it is 132 (SD 16). American Mensa's own test reports whether you reached the 98th percentile, not a single IQ number.
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The American Mensa Admission Test
The US admission test is actually two separate standardized tests taken in one proctored session of roughly two hours. Qualifying on either one is enough. It is offered at scheduled group-testing events around the country and, in some cases, through proctored at-home options. There is a test fee — historically modest and periodically increased — so check the current amount when you register.
Because the session is supervised, the result is accepted for membership. This is the key difference from any online quiz: an unproctored score, including one from our test, can estimate your ability but cannot be used to join.
Accepted prior scores
American Mensa accepts qualifying scores from a wide range of standardized and intelligence tests taken under proper conditions — Wechsler scales, Stanford-Binet, Cattell, and many others. In the past it also accepted certain older college-admissions and military tests, but which of those still qualify has changed over the years (for example, more recent versions of some admissions tests are no longer accepted). Always check American Mensa's current accepted-tests list before submitting evidence.
Dues and what members get
Once you qualify, you pay annual membership dues (on the order of tens of dollars per year; American Mensa has listed dues around $79/year in recent years — confirm the current figure). Membership includes the national magazine, local group activities, special-interest groups, scholarships, and access to the national and international Mensa community.
Beyond the magazine and local groups, American Mensa runs a large calendar of activities that is a big part of why people actually join. The Annual Gathering is a multi-day national event with talks, games, and social programming; regional gatherings happen throughout the year; and hundreds of special-interest groups connect members around everything from chess to science fiction to entrepreneurship. There is also a Gifted Youth program for younger members and their families, and a scholarship program. For most members, the value is the community and the events, not the certificate itself.
Every dollar figure here is approximate and subject to change — American Mensa updates fees and accepted tests from time to time, so treat the official site as the source of truth. The same goes for testing locations and at-home options, which shift as the organisation adjusts its programme; the current American Mensa site always reflects what is available where you live right now.
Frequently Asked Questions
Q: How much does the American Mensa test cost?
A: A modest test fee that American Mensa sets and periodically updates (historically in the tens of dollars). Check the current amount when you register for a testing session.
Q: What IQ do you need for American Mensa?
A: The top 2% (98th percentile) — an IQ of 130 on the Wechsler scale (SD 15) or 132 on Stanford-Binet (SD 16). American Mensa's own test simply reports whether you cleared that percentile.
Q: Does American Mensa accept SAT or ACT scores?
A: Only certain older versions, and the rules have changed. American Mensa historically accepted some pre-1994 SAT scores; more recent admissions-test versions are generally not accepted. Verify against the current accepted-tests list before applying.
Q: Can I take the American Mensa test at home?
A: Sometimes. American Mensa has offered proctored at-home testing in addition to in-person group sessions, but availability changes — check current options on the American Mensa site.
References
Last updated: July 13, 2026
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