KCO may refer to:
Music
- KCO, the former stage name of Keiko (musician)
- Kings Chamber Orchestra, a chamber orchestra based in the United Kingdom
- Royal Concertgebouw Orchestra (Dutch: Koninklijk Concertgebouworkest), a symphony orchestra based in Amsterdam
Other uses
- Agip KCO, a division of Agip operating in the Kazakhstan (northern) sector of the Caspian Sea
- Cengiz Topel Naval Air Station (IATA code KCO), a Turkish Navy air station and civil airport in Kocaeli Province, Turkey
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