Secret Army may refer to:
History Secret Army (Belgium), an organisation in the Belgian Resistance during World War II Secret Army (France), or Armée secrète, an organisation in the French Resistance during WW II Secret Army, in the 1959–1975 Laotian Civil War, U.S.-trained anti-communist forces Organisation armée secrète, a French dissident paramilitary organization during the Algerian War Secret Army Organization, a 1970s right-wing paramilitary organization in Southern California, U.S.
Other uses Secret Army (novel), a 2010 Henderson's Boys novel by Robert Muchamore Secret Army (TV series), a 1977–1979 British drama series The Secret Army, a 1972 documentary film about the Provisional IRA