Exo is a South Korean–Chinese boy band.
Exo or EXO may also refer to:
- exo-, a medical prefix denotes something as "outside" another
- Exo (album), a 2012 album by Gatekeeper
- Exo (novel), a novel in the Jumper series by Steven Gould
- Exo (public transit), a regional public transit agency in greater Montreal, Canada
- Exo Inc., a company that makes protein bars using flour made from crickets
- Enriched Xenon Observatory (EXO), a particle physics experiment
- Exo, a 2017 novel by Fonda Lee
- The Exo Building, an office building in Dublin, Ireland.