A fifth column is a group of people who undermine a larger group from within.
Fifth Column may also refer to:
Literature The Fifth Column, a 1938 play by Ernest Hemingway, published in the volume The Fifth Column and the First Forty-Nine Stories Fifth Column, a 1940 book by John Langdon-Davies
Film and television The Fifth Column (film) (also known as Hinkerort zorasune), a 2010 short film set in Beirut "The Fifth Column", episode 2.35 of the military science fiction series Exosquad "The Fifth Column", a group of alien dissidents in the V science fiction franchise, first shown in the original miniseries. (The Fifth Column), a German television series
Music Fifth Column (band), an all-women post-punk band from Toronto, Canada The 5ifth Column, an album by industrial rock band Acumen Nation Fifth Column, a 2003 album by British musician U.N.P.O.C. The 5th Column, official street team of the rock band AFI Fifth Column Records, an industrial record label active in the 1990s
Others Fifth Column (intelligence operation), a Second World War deception operation by MI5 The Fifth Column, a political and media gossip page in Ireland's Sunday Independent Fifth Column (sotūn-e panjom), an editorial in the Iranian newspaper Jame'e written by Ebrahim Nabavi The 5th Column, a fictional Nazi group in the City of Heroes MMORPG computer game The Fifth Column Podcast, a libertarian-leaning podcast hosted by Kmele Foster, Michael C. Moynihan, Matt Welch.
See also Sixth Column, a 1941 science fiction novel by Robert A. Heinlein