"I Know You're Out There Somewhere" is a 1988 single by the progressive rock band The Moody Blues. It was written by guitarist Justin Hayward, and it is the sequel to the Moody Blues' 1986 single "Your Wildest Dreams", also written by Hayward. Following its release as a single in May 1988, it was included as the opening track of the 1988 album Sur la Mer. The single has a label time of 4:15, excising the instrumental bridge in the middle of the song, while the LP has a label time of 6:38.

The song's lyrics continue from the lyrics of "Your Wildest Dreams". The lyrics from "Your Wildest Dreams" tell the story of a man who is remembering his first love, and wonders if she remembers him the way he remembers her. In "I Know You're Out There Somewhere", the man realizes he still loves her, and vows to "return again" to her.

As with "Your Wildest Dreams", a music video was produced for "I Know You're Out There Somewhere." The video is a direct, linear sequel to the one for "Your Wildest Dreams", and again features Janet Spencer-Turner as the character from the singer's past. Actor Ben Daniels portrays the younger version of Justin Hayward.

It was also the band's final Top 40 single in the United States, peaking at #30 on the Billboard Hot 100.

Justin Hayward has released two cover versions as a solo artist. His 2013 album Spirits of the Western Sky has a dance version titled "Out There Somewhere", plus an extended remix by Raul Rincon. His 2014 live album Spirits Live... includes a cover with the original title.

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