State of War may refer to:

• State of war, a state of armed conflict between states

• State of War (novel), a 1988 novel by Ninotchka Rosca

• State of War (play-by-mail game), a 1987 play-by-mail game

• State of War (video game), a 2001 video game

• State of War: The Secret History of the CIA and the Bush Administration, a 2006 book by James Risen

See also

• Declaration of war (disambiguation)