Which Lego theme is based on the Harry Potter series?

The Lego theme based on the Harry Potter series is Lego Harry Potter.

The theme adapts characters, locations, vehicles, creatures, and scenes from the Harry Potter films, which themselves are based on J. K. Rowling’s novels. Lego developed the range under license from Warner Bros. The first sets were released in 2001 to coincide with Harry Potter and the Philosopher’s Stone, introducing models such as Hogwarts Castle, the Hogwarts Express, and classroom scenes.

The theme was not continuously available. Its original run covered 2001 through 2007, followed by a revival in 2010 and 2011. Lego later returned to the wizarding world in 2018, expanding the range with updated versions of Hogwarts locations and sets connected with the broader Wizarding World, including Fantastic Beasts-related products.

The main mix-up is confusing a Harry Potter set with a broader Lego category. Lego Dimensions and Lego Collectible Minifigures also used Harry Potter characters, while Lego Art produced Hogwarts-themed mosaics, but the dedicated construction-toy theme remains Lego Harry Potter. Lego Star Wars, Lego Indiana Jones, and Lego Lord of the Rings are separate licensed themes based on different fictional universes.