Secret Six may refer to:

• Secret Six, a group of six men who secretly funded American abolitionist John Brown
• Secret Six (Chicago), a group of six men who organized the Chicago business community against gangster Al Capone
• Secret Six (comics), various fictional teams in the DC Comics Universe
• The Secret Six, 1931 film.
• The Secret 6 was the title of four hero pulps written by Robert J Hogan and published by "Popular Publications" about a secret group of mystery crime fighters. The title ran from October 1934 to January 1935, inclusive.

This disambiguation page lists articles associated with the title Secret Six.
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