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Styx - Classics, Volume 15 is a greatest hits compilation for the band Styx, released in 1987 by A&M Records as part of A&M's classics series of greatest hits albums for artists on its label.
Like Best of Styx, this compilation is label-exclusive. Therefore, it only contains Styx's hits on the A&M label—which necessarily excludes Styx's significant hit "Lady", which was recorded for Wooden Nickel Records. Of note, the version of "Come Sail Away" on the album is an abbreviated edit with an early fade, and the version of "Miss America" is a live performance of the song.