Curse of the Hidden Mirror is the thirteenth studio album by American rock band Blue Öyster Cult, released on June 5, 2001.

Lackluster sales and poor relations led to the band being dropped by their label, Sanctuary Records; as a result, BÖC did not release another studio album for nearly 20 years, until the release of The Symbol Remains in 2020.

John Shirley, an author of cyberpunk science fiction, wrote the lyrics for many songs of the album.

"Showtime" was originally written and recorded for Cultösaurus Erectus but did not make the final cut.

Curse of the Hidden Mirror is the final Blue Öyster Cult album to feature longtime keyboardist Allen Lanier, who died in 2013.