The following is a list of fictional characters from Michael Crichton's 1990 novel Jurassic Park, its 1995 sequel The Lost World, and their film adaptations, Jurassic Park (1993) and The Lost World: Jurassic Park (1997). Also included are characters from the sequel films Jurassic Park III, Jurassic World, Jurassic World: Fallen Kingdom, Jurassic World Dominion, and the short film Battle at Big Rock. These films are not adaptations and have no original source novels but contain some characters and events based on the fictional universe of Crichton's novels. Some cast members from the films have also reprised their roles in certain video games.
The original novel introduces several characters who would appear throughout the film series, including Dr. Alan Grant, Dr. Ellie Sattler, Dr. Ian Malcolm, John Hammond, and Dr. Henry Wu. Jurassic World introduces Owen Grady and Claire Dearing, while Fallen Kingdom introduces Maisie Lockwood, who are the lead characters of the Jurassic World trilogy.