"Waltz for Debby" is a jazz standard composed by Bill Evans. A piano trio jazz waltz, it was first recorded on Evans's 1956 album New Jazz Conceptions and, perhaps more famously, on his 1961 live album Waltz for Debby. It has been recorded by many artists, both as an instrumental and as a vocal piece. The song's lyrics were written by Gene Lees. "Debby" in the song title refers to Evans' niece, Debby Evans. The song is also known in Swedish by the name "Monicas vals", with lyrics by Beppe Wolgers.