Parasite may refer to several things:
- Episodes
- "Parasite Lost", the fifth episode of the fourth season of Supergirl, and the seventieth episode overall.
- Characters
- Angon alien parasite, an alien parasite which turns an individual into the villain Parasite.
- Rudy Jones, a research scientist and the first Parasite.
- Raymond Jensen, a former agent of the D.E.O. and the second Parasite.