Fortress is a 1992 science fiction action film directed by Stuart Gordon and shot at Warner Bros. Movie World in Queensland, Australia. The story takes place in a dystopian future. The main character, John Henry Brennick (Christopher Lambert), and his wife Karen B. Brennick (Loryn Locklin) are sent to a maximum security prison because she is pregnant with a second child, which is against a strict one-child policy.

The film was a financial success, but critical reviews were mixed.

A sequel, Fortress 2: Re-Entry, was released in 2000, with Lambert reprising his role.