Radioactive Man may refer to:
- Radioactive Man, a Season 7 episode
- Radioactive Man (character), a comic book superhero.
- Radioactive Man (Bongo), a Bongo comic series.
- Radioactive Man (comic), the series inside the Simpsons world.
- Radioactive Man (TV series), a TV series inside the Simpsons world.
- Radioactive Man (film), a movie inside of the Simpsons world.
- The Simpsons Superman alias Dean Cain