Space dust may refer to:
- Cosmic dust, particles floating in space
- Space debris, or human-made objects abandoned in space
- Regolith, loose particulate soil of which dust is a main component, typically in reference to extraterrestrial bodies
- Lunar soil (Moon dust)
Music
- Spacedust, a British music production duo
- Space Dust, a New Zealand space rock band formed in 1993
- "Space Dust", a song by Hawkwind
Other uses
- Space Dust, a 1970s confectionery brand
- Slang for crack cocaine dipped in PCP; see List of polysubstance combinations