How do you become a member of MENSA?

There are two primary ways to show that you meet the basic requirement (IQ in the top 2% of the population).

1) Take a proctored (supervised) test. Another answerer mentioned that.

2) Qualify based on some other accepted test scores, like SAT, ACT, GMAT, GRE, etc.

Since you are from Canada, here's a link to the Canadian division of Mensa, http://www.mensacanada.org/

Here's the "How do I join?" link, http://www.mensacanada.org/howjoinen.htm

And, here's the "Prior Evidence" link that shows you what test scores can automatically qualify you for membership. http://www.mensacanada.org/howjoinen.htm

Membership in Mensa is open to persons who have attained a score within the upper two percent of the general population on an approved intelligence test that has been properly administered and supervised. There is no other qualification or disqualification for membership eligibility.

The term "IQ score" is widely used but poorly defined. There are a large number of tests with different scales. The result on one test of 132 can be the same as a score 148 on another test. Some intelligence tests don't use IQ scores at all. Mensa has set a percentile as cutoff to avoid this confusion. Candidates for membership in Mensa must achieve a score at or above the 98th percentile (a score that is greater than or equal to 98 percent of the general population taking the test) on a standard test of intelligence.

Generally, there are two ways to prove that you qualify for Mensa: either take the Mensa test, or submit a qualifying test score from another test. There are a large number of intelligence tests that are "approved". More information on whether a test you have taken is approved, as well as information on the procedure for taking the Mensa test, can be obtained from the nearest Mensa office. There are no on-line tests that can be used for admission to Mensa. Feel free to contact Mensa for specific details about eligibility.

Mensa has no other eligibility requirements other than IQ testing. However, many tests are not valid for people under the age of 16. You should contact the nearest Mensa office for more information.

Membership in Mensa is open to persons who have attained a score within the upper two percent of the general population on an approved intelligence test that has been properly administered and supervised. There is no other qualification or disqualification for membership eligibility.

The term "IQ score" is widely used but poorly defined. There are a large number of tests with different scales. The result on one test of 132 can be the same as a score 148 on another test. Some intelligence tests don't use IQ scores at all. Mensa has set a percentile as cutoff to avoid this confusion. Candidates for membership in Mensa must achieve a score at or above the 98th percentile (a score that is greater than or equal to 98 percent of the general population taking the test) on a standard test of intelligence.

Generally, there are two ways to prove that you qualify for Mensa: either take the Mensa test, or submit a qualifying test score from another test. There are a large number of intelligence tests that are "approved". More information on whether a test you have taken is approved, as well as information on the procedure for taking the Mensa test, can be obtained from the nearest Mensa office. There are no on-line tests that can be used for admission to Mensa. Feel free to contact Mensa for specific details about eligibility.

Mensa has no other eligibility requirements other than IQ testing. However, many tests are not valid for people under the age of 16. You should contact the nearest Mensa office for more information.

You have to test in the top 2 percent of accepted IQ tests or standardized tests (i.e., GMAT or LSAT). They accept scores from approximately 200 tests, but call the MENSA office nearest you and find out if they accpet the test you've taken and have official scores sent to MENSA. Or you can take the official MENSA test. Then you have to pay membership dues.

The info people copied from the website is accurate. When I became a member, I sent for a take at home test and paid the fee. It was 'honor system'. A lot of questions and analogies, vocab helps. When I sent that to them, they wrote back saying I was in the top 1% and so had qualified to take the supervised test. They sent me sites and I went to John Carroll University. The test was supervised by a Psychology Professor and again I had to pay a fee. Eventually I got my letter of acceptance and paid the dues to become a member. You have to pay dues every year, but they do give you access to a lot of neat stuff. My favorite is the SIG's - special interest groups. I made contact with some really cool people who love what I do and when our conversarions get going I don't have to hold back. I know the info from the site is probably enough to answer your question, but thought telling you what I experienced might help. Good Luck!

certifiably have an IQ in the top 2%

Take an IQ test. if you rate high enough you get in.

Pass the test and pay the fees.

Read http://en.wikipedia.org/wiki/Mensa_International

Good Luck!!!