"Parallel Universe" is a single by the Red Hot Chili Peppers from their 1999 album, Californication. Although it never was released as a tangible CD single, it charted on the US Modern Rock Tracks at number 37.

It is the second track on Californication. Although being one of the album's loudest songs, in terms of distortion, it does not contain any of the Chili's signature funk-orientated bass lines which they had been primarily known for in the past. Anthony Kiedis' vocals are subdued during the verses, reflecting an approach towards melodic balladry, whilst similarly the song lyrically tackles darker, more introspective themes than those that the band generally had a reputation for.