MTK may refer to:
Sport MTK Budapest, a Hungarian multi-sports club MTK Global (Mack the Knife Global), a professional boxing and MMA promoter
Business MediaTek, a Taiwanese microchip manufacturer Katowice International Fair (), Poland MTK Group, runs some public buses in Sofia
Entertainment MTK (musical group), a Brazilian pop and rap group Matt the Knife (born 1988), an American stage magician and mentalist Mike the Knight a 2011 Canadian/British children's television series.
Other Vehicle registration of Main-Taunus-Kreis, Germany Makin Airport, Kiribati (IATA code "MTK")
See also MTK-2, Russian version of Baudot telegraphy code