KCO may refer to:
Music KCO, the former stage name of Keiko (musician) Kings Chamber Orchestra, a chamber orchestra based in the United Kingdom Kirkland Civic Orchestra Royal Concertgebouw Orchestra (), a symphony orchestra based in Amsterdam Korean Chamber Orchestra
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 Kelly's Coal Office, coal merchant offices, John Kelly Limited, Northern Ireland Kenniscentrum voor Coöperatief Ondernemen KU Leuven, Centre of Expertise for Cooperative Entrepreneurship