On Guard may refer to:
Film and television On Guard (serial), a 1927 film serial On Guard (1984 film), an Australian film On Guard (1997 film), a French swashbuckler film "On Guard" (White Collar), a 2011 TV episode
Other uses On Guard, a 1903 novel by Upton Sinclair "On Guard", a 2021 song by Lauren Jauregui "On Guard", a 2001 song by Le Tigre from Feminist Sweepstakes Among Us Story: On Guard
See also En garde (disambiguation)