Delirium may refer to:
- Line of Delirium, a 1996 Russian Space Opera novel written by Sergey Lukyanenko.
- Delirium, a 2004 Colombian novel written by Laura Restrepo.
- Delirium, a 2006 stage show performed by the "Cirque du Soleil" company.
- Delirium, a 2014 Argentine comedy film directed by Carlos Kaimakamian Carrau.
- Delirium Series, a 2013 Young Adult Dystopia series of novels written by Lauren Oliver.
- Delirium, a 2018 Psychological Horror film directed by Dennis Iliadis.
- Delirium, a Worm / Vampire: The Masquerade crossover fanfic written by audriuska12.
- D'LIRIUM, a 2023 horror-shooter game developed by B52 Development Team.