A lifeguard is an emergency service worker.

Lifeguard or Life Guard may also refer to:

• Lifeguard (film), a 1976 film starring Sam Elliott and Anne Archer
• The Lifeguard, a 2013 film starring Kristen Bell and David Lambert
• The Lifeguard (1980 film), a Soviet romantic drama film
• Lifeguard! Southern California, an American reality television series
• Lifeguard, a book by James Patterson
• The Lifeguard (novel), a 1988 novel by Richie Tankersley Cusick
• "Lifeguard", a short story in the collection Pigeon Feathers and Other Stories by John Updike
• Lifeguard (comics), an X-Men character

• Life guard, a military elite or bodyguard unit in European countries
• Life Guards (United Kingdom), a British Army regiment
• Life Guards (Sweden), a Swedish Army regiment
• Royal Bavarian Life Guards, a Bavarian Army regiment
• Royal Life Guards (Denmark), a Danish Army regiment
• Washington's Life Guard, a short-lived Continental Army infantry and cavalry unit (1776–1783)
• Life Guards (France)
• Life Guards of Horse
• Life Guard Horse Regiment
• Life Guards Jager Regiment (Russia)

• Lifeguard (automobile safety), a 1956 safety package marketed by the Ford Motor Company
• Lifeguard (rail transport), a metal bracket placed ahead of a locomotive's wheels to deflect obstacles
• Life Guards' Dragoon Music Corps
• Life Guard DC