Magical creatures are an aspect of the fictional Wizarding World contained in the Harry Potter series and connected media originally created by British author J. K. Rowling. Throughout the seven main books of the series, Harry and his friends encounter many of these creatures on their adventures in Hogwarts, the Forbidden Forest, or other locations throughout the Wizarding World. In addition, students learn to take care of creatures such as hippogriffs and unicorns in the Care of Magical Creatures class at Hogwarts. Rowling has also written Fantastic Beasts and Where to Find Them, a guide to the magical beasts found in the series, and based on the fictional textbook of the same name written by Newt Scamander and used by students at Hogwarts.

The Wizarding World is a fantasy media franchise and shared fictional universe centred on the Harry Potter novel series by J. K. Rowling. A series of films have been in production since 2000, and in that time eleven films have been produced—eight are adaptations of the Harry Potter novels and three are part of the Fantastic Beasts series. The films are owned and distributed by Warner Bros. Pictures. The series has collectively grossed over $9.6 billion at the global box office, making it the fourth-highest-grossing film franchise of all time.