In the Court of the Crimson King is the title of a 1969 album by the British progressive rock group King Crimson.

The album opens with a track called "21st Century Schizoid Man", which features heavily distorted vocals, a driving mechanical rhythm and piercingly loud saxophone and guitar. The pace then abruptly changes with a gentle melodic piece called "I Talk to the Wind". "Moonchild" is an ethereal psychedelic piece which closes with a quiet freeform improvisation. Both "Epitaph" and the title track, "In the Court of the Crimson King", feature sweeping mellotron orchestrations.

The album was remastered and re-released in the late 1990s.

Along with songs by Yes, the King Crimson song "Moonchild" was used to great effect in the 1998 movie Buffalo 66