Mortal Engines is a 2001 novel by Philip Reeve.

Mortal Engines may also refer to: Mortal Engines (film), a 2018 film based on the novel Mortal Engines (soundtrack), the soundtrack for the film Mortal Engines Quartet, the series of which Reeve's book is a part Mortal Engines (Lem), a collection of short stories by Stanislaw Lem