KMO may refer to: Kemayoran railway station, a railway station in Jakarta, Indonesia Knowledge Master Open, a semiannual worldwide academic competition Korean Mathematical Olympiad, a competition in South Korea KMO (gene), which encodes the enzyme kynurenine 3-monooxygenase Manokotak Airport, a state-owned airport in Alaska, IATA code KMO KKMO, a Tacoma, Washington based radio station that once held the callsign KMO