A fraternity is an organization that represents the relationship between its members as akin to brotherhood. There is a great deal of overlap between the terms Friendly Society and fraternal organization. Most mystical organizations are also fraternal.

What follows is a list of contemporary fraternities.

• Ancient Mystical Order Rosae Crucis
• Benevolent and Protective Order of Elks
• B'nai Brith
• Charitable trust
• Civitan
• E Clampus Vitus
• Fraternal Forestry (Ancient Order of Foresters, Ancient Order of United Workmen, Independent Order of Foresters)
• Freemasonry
  • Scottish Rite
  • York Rite
  • Shriners
  • Masonic Youth organizations
  • Order of the Eastern Star
• Junior Chamber International (Jaycees or Junior Chamber of Commerce)
• Kiwanis
• Knights of Columbus
  • Columbian Squires
• Lions Clubs International
• Oddfellows, Independent Order of Odd Fellows
• Optimist International
• Orange Order
• Order of the Boy who Kissed the Sun
• Ordo Templi Orientis
• Red Cross
• Rosicrucian Fellowship
• Rotary International
• Ruritan
• Samaritans (charity)
• Sertoma International
• S.K.U.M. international
• Woodmen of the World
• Zonta International

• Apex

• AKO Fraternity
• Canadian Order for Home Circles
• Kinsmen/Kinettes
• Knights of Pythias

• Afrikanerbond

• Orange Order
• Order of Scottish Clans
• Freemasonry

• Aid Association of Lutherans
• Apex
• Chautauqua Institute
• Knights of Columbus
• Dramatic Order Knights of Khorassan
• Fraternal Order of Eagles
• Fraternal Order Orioles
• Knights of the Golden Eagle
• Knights of the Maccabees
• Knights of Pythias
• Ku Klux Klan
• Modern Brotherhood of America
• Loyal Order of Moose
• Improved Order of Red Men
• National Haymakers Association
• Quota
• Roosevelt Institution
• Royal Neighbors of America
• Royal Templars of Temperance
• Native Sons of the Golden West
• Twilight Club
• United American Mechanics
• Volunteers of America

• Fraternity
• List of organizations
• List of civic and political organizations
• List of professional organizations
• Service organization

• Complete listing of all secret society, fraternal organizations and fraternal orders with abbreviations, with slogans and mottoes
• The Web of Hiram A Site dealing with Freemasonry at Bradford University.