World at War

World at War could be an alternative name for World War II

It may also refer to:

 Another name for the Darkness Series (2000–2005) by Harry Turtledove
 The World at War (film) (1942), propaganda film produced by the Office of War Information
 The World at War (1973–74), British television series documenting World War II
 Call of Duty: World at War (2008), video game developed by Treyarch
 A World at War (2003), World War II-themed board wargame by GMT Games
 Left Behind: World at War (2005), video film, second sequel to Left Behind
 World at War (2006–2010), a (now defunct) modification for the video game Half-Life 2