Star seed

Star seed or starseed may refer to:
 * Starseed, a 1973 book by Timothy Leary
 * Star Seed, a 2021 single by Loona
 * Starseed (band), South-African/British rock band
 * Starseed (novel), a 1991 science fiction novel by Spider Robinson and Jeanne Robinson
 * "Starseed" (song), a 1994 single by Our Lady Peace
 * Starseed launcher, a hypothetical concept of a space exploration system
 * Starseeds, fictional microorganisms used by Outsiders to seed new planets with life in Larry Niven's Known Space science fiction series
 * Star seeds, a type of crystal in sentient life in the Sailor Moon: Sailor Stars series
 * Star people (New Age), individuals who state they have originated from another planet or Galaxy
 * A giant machine hypothesized to be able to collapse black holes among other things, in the video game Solar Ash. The McGuffin of the game's story.