According to American Mensa's website (), 38 percent of its members are baby boomers between the ages of 51 and 68, 31 percent are Gen-Xers or Millennials between the ages of 27 and 48, and more than 2,600 members are under the age of 18. There are more than 1,800 families in the United States with two or more Mensa members. In addition, the American Mensa general membership is "66 percent male, 34 percent female". The aggregate of local and national leadership is distributed equally between the sexes.