Common knowledge is knowledge which is known to be true, and knowledge which most people know.

Common knowledge may also refer to:

Common knowledge (logic), a logical concept Common Knowledge (game show), an American television game show hosted by Joey Fatone Common Knowledge?, a 2014 book by Dariusz Jemielniak "Common Knowledge", a Series C episode of the television series QI (2005)

See also Common (disambiguation) Knowledge (disambiguation)