Gamera vs. Barugon (大怪獣決闘 ガメラ対バルゴン, Daikaijū kettō: Gamera tai Barugon, lit. Great Monster Duel: Gamera vs. Barugon) is a 1966 Japanese kaiju film directed by Shigeo Tanaka and produced by Daiei Film. It is the second entry in the Gamera film series, and stars Kōjirō Hongō, Kyōko Enami, and Yūzō Hayakawa, with Teruo Aragaki portraying the giant monster Gamera.

Cast
- Kojiro Hongo as Keisuke Hirata
- Kyōko Enami as Karen
- Yūzō Hayakawa as Kawajiri
- Takuya Fujioka as Dr. Satō
- Kōji Fujiyama as Onodera
- Akira Natsuki as Ichirō Hirata
- Yoshirō Kitahara as Professor Amano
- Ichirō Sugai as Dr. Matsushita
- Bontarō Miake as Self-Defense Force General
- Jutarō Hōjō as Self-Defense Force Commander
- Kazuko Wakamatsu as Sadae Hirata
- Yuka Konno as Onodera’s lover
- Eiichi Takamura as Governor of Osaka
- Kenichi Tani as Lee
- Kōichi Itō as Metropolitan Police Superintendent-General
- Hikaru Hoshi as Awaji Maru captain
- Osamu Abe as Awaji Maru crewman
- Yoshihiro Hamaguchi as Awaji Maru crewman
- Teruo Aragaki as Gamera