KOI may refer to:
- KOI character encodings, for Cyrillic script
- Indonesian Olympic Committee (Indonesian: Komite Olimpiade Indonesia)
- Kepler object of interest
- Kirkwall Airport (IATA airport code)
- Komi-Permyak language (ISO language code)
See also
edit- KOI-18, a cryptographic fill device used by the U.S. government
- All pages with titles beginning with KOI
- All pages with titles containing KOI
- Koi (disambiguation)