High School Fleet: The Movie (Japanese: 劇場版 ハイスクール・フリート, Hepburn: Gekijōban Haisukūru Furīto) is a 2020 Japanese animated film and a sequel to High School Fleet (2016) and its 2017 original video animation (OVA). Produced by A-1 Pictures and distributed by Aniplex, the film is directed by Jun Nakagawa from a script written by Takaaki Suzuki and Kunihiko Okada, and features an ensemble cast that includes Shiina Natsukawa, Lynn, Nozomi Furuki, Atsumi Tanezaki, Yuuko Kurose, Yurika Kubo, Sora Amamiya, Naomi Ōzora, Minami Takahashi, Maria Naganawa, Tomori Kusunoki, Satomi Amano, Miyu Tomita, and Sayumi Suzushiro. Set three months after the events of the OVA, the film follows the crew of Harekaze II ship during a festival participated by various girls' maritime schools when a ship hijacking takes place.

An anime film based on the High School Fleet franchise was announced in April 2018. A-1 Pictures took over the animation production of the film from Production IMS in April 2019. In the same month, the cast and staff of the franchise's 2016 anime television series were announced to be returning for the film.

High School Fleet: The Movie premiered in Tokyo on January 12, 2020, and was released in Japan on January 18. The film grossed ¥67 million at the box office.