Diamond Heart may refer to:
Music Diamond Heart, an album by Ladies of the Canyon "Diamond Heart", a song by Lady Gaga from Joanne "Diamond Heart", a song by BoA from the album The Face "Diamond Heart", a song by Alan Walker "Diamond Heart", a song by Marissa Nadler from Songs III: Bird on the Water
Other Diamond Heart, a series of books by A. H. Almaas A Diamond Heart Production, an artist development label and publishing company formed by Vanessa Silberman