Gigan (ガイガン?) may refer to... Gaigan
- Gigan - The Gigan featured during the events of the Showa era in the Godzilla series. (1954 - 1975)
- Final Wars Gigan - The Gigan that appeared during the Millennium series, in the 2004 Godzilla film, Godzilla: Final Wars.
- Gigan - The Gigan that was featured in the 2017 novel, Godzilla: Project Mechagodzilla.
- Gigan - The Gigan that was featured in the web show, Godziban.