Insidious: The Red Door is a 2023 American supernatural horror film directed by Patrick Wilson (in his directorial debut) from a screenplay by Scott Teems based on a story by Leigh Whannell and Teems. It is a direct sequel to Insidious: Chapter 2 (2013), and the fifth installment in the Insidious franchise. Original director James Wan serves as a producer, as does Jason Blum through his Blumhouse Productions banner. Wilson, Ty Simpkins, Rose Byrne, Andrew Astor, Steve Coulter, Joseph Bishara, Whannell, Angus Sampson, and Lin Shaye reprise their roles from previous films. Sinclair Daniel and Hiam Abbass join the cast.

After the release of Insidious: The Last Key in 2018, Blumhouse opted for possibilities to produce future films in the series, including a crossover with the Sinister series. In October 2020, the studio announced that Wilson would direct and star in the new film, with Teems writing the script based on a story written with Whannell. With a production budget of $16 million, filming took place in August 2022 at the Morris County and Madison locations around Jersey City.

Insidious: The Red Door was theatrically released in the United States on July 7, 2023, by Sony Pictures Releasing. The film received mixed reviews from critics and grossed over $189 million worldwide, becoming the highest-grossing film of the series. It was nominated for Best Horror Film at the 51st Saturn Awards.