MKK (disambiguation)

MKK is mitogen-activated protein kinase kinase, an enzyme.

MKK may also refer to:
 * Malmö KK, Swedish swim team from Malmö
 * Main-Kinzig-Kreis, a kreis (district) in Hesse, Germany
 * MKK, the IATA Airport code for Molokai Airport on the island of Molokai, Hawaii
 * Mong Kok East station, Hong Kong; MTR station code MKK
 * Museum für Kunst und Kulturgeschichte in Dortmund, Germany
 * The Morgan-Keenan-Kellman system, a stellar classification system also known as Yerkes spectral classification