MKO

MKO may refer to:


 * ISO 639:mko or Mingang Doso, a language of Nigeria
 * Mojahedin-e-Khalq Organization, Iran
 * Mauna Kea Observatories, Hawaii
 * Münchener Kammerorchester, Munich chamber orchestra
 * IATA code for Davis Field airport, Muskogee, Oklahoma
 * Mary-Kate Olsen, American designer and businessperson
 * Markona railway station, Odisha, India
 * MKO Abiola (1937–1998), Nigerian businessperson
 * Mechanical Keep Out, the clearance required around a PCBA to avoid mechanical fitment issues