Mensa of Wisconsin
- Covering most of Wisconsin, as well as northern Michigan.
- http://wi.us.mensa.org/

Maumee Valley Mensa
- Covering the Toledo, Ohio area, and part of southern Michigan.
- http://maumeevalley.us.mensa.org/

Chicago Area Mensa
- Includes activities and events calendar, scholarship program, and contacts. Events are held in the Chicagoland area including northern Indiana.
- http://chicago.us.mensa.org/

Iowa-Illinois Mensa
- For members primarily in eastern Iowa and western Illinois, including the Quad Cities area. Provides calendar of events and a members-only page.
- http://iowa-illinois.us.mensa.org/

American Mensa - Region 9
- Far West Region: includes Arizona, Hawaii, Utah, and the southern half of California and Nevada.
- http://region9.us.mensa.org/

American Mensa - Region 5
- Southeast Region: includes Alabama, Georgia, Mississippi, North Carolina, South Carolina and Tennessee.
- http://region5.us.mensa.org/

American Mensa - Region 2
- Middle Atlantic Region: covering Delaware, District of Columbia, Maryland, New Jersey, Pennsylvania, and Virginia.
- http://region2.us.mensa.org/

American Mensa - Region 3
- Great Lakes and Ohio Valley Region: includes Ohio, Michigan, Kentucky, West Virginia, Western Upstate New York, and Western Pennsylvania.
- http://region3.us.mensa.org/

American Mensa - Region 6
- Southwest Region: includes Arkansas, Louisiana, New Mexico, Oklahoma, and Texas.
- http://www.region6.us.mensa.org/

American Mensa
- National chapter of Mensa. Includes news, events, membership information, and directory of local chapters.
- http://www.us.mensa.org/

American Mensa - Region 1
- Northeast Region: from Maine to Northern New Jersey and all of New York State except the Buffalo area.
- http://www.region1.us.mensa.org/

American Mensa - Region 8
- Pacific Intermountain Region: includes Alaska, Washington, Oregon, Utah, Idaho, Montana, Nevada, and northern California.
- http://www.informact.com/region8/