Gamera 2: Attack of Legion (ガメラ2 レギオン襲来, Gamera Tsū: Region Shūrai, lit. 'Gamera 2: Invasion of Legion') is a 1996 Japanese kaiju film directed by Shusuke Kaneko, with special effects by Shinji Higuchi. Produced by Daiei Film and distributed by Toho, the film is the 10th entry in the Gamera film series, as well as the second film in the franchise's Heisei period, serving as a direct sequel to the 1995 film Gamera: Guardian of the Universe. The film stars Toshiyuki Nagashima, Miki Mizuno, Tamotsu Ishibashi, and Mitsuru Fukikoshi, with Ayako Fujitani and Yukijirō Hotaru reprising their roles from the previous film, and with Akira Ohashi portraying the giant turtle monster Gamera.

Gamera 2: Attack of Legion also features Mizuho Yoshida as Legion, a race of insectoid extraterrestrials that invade Earth, prompting Gamera to come to the planet's defense. The film was released theatrically in Japan on July 13, 1996, and was followed by Gamera 3: Revenge of Iris in 1999.

A variety series How Do You Like Wednesday? is largely inspired by the trilogy, and several music and telops and formats used for trailers and various scenes of the program are reused from the trilogy. As the film features Hokkaido, Yō Ōizumi, Takayuki Suzui, and Ken Yasuda appeared as extras, making it the first film career for Ōizumi.