"Dear Mr. Fantasy" is a rock song by Traffic from their 1967 album, Mr. Fantasy. Jim Capaldi contributed the lyrics, while Steve Winwood and Chris Wood composed the music. In a song review for AllMusic, Lindsay Planer writes: "A slightly trippy dark and foreboding tone permeates both the lyrics and arrangement contrasting the rock-solid pop delivery. Tying it all together are Winwood’s emotive and residually mournful lyrics. With a distinct blue-eyed soul intonation – perfected during a seminal stint in the Spencer Davis Group – he effortlessly increases the drama with a combination of slightly behind the beat timing and empathic vocals." Dave Matthews mentioned this song specifically as part of his speech inducting Traffic into the Rock and Roll Hall of Fame, and this is the song they played as part of that same induction.

Renditions

Traffic recorded an extended version (10:57) for their live album Welcome to the Canteen (1971). Winwood played the song at Eric Clapton's 2007 Crossroads Guitar Festival and the song appears on the festival DVD. Winwood and Clapton played the song on their joint tour; a live recording appears on the album Live from Madison Square Garden (2009). Planer also notes performances by Mike Bloomfield and Al Kooper (1969, The Live Adventures of Mike Bloomfield and Al Kooper); the Grateful Dead (1980s–1990s), and Crosby, Stills, & Nash (1991, CSN box set).