MTK
MTK may refer to:

Sport
 MTK Budapest (), a multi-sport club in Budapest, Hungary
 Dunaharaszti MTK (), a football club in Dunaharaszti, Hungary
 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

Other
 Main-Taunus-Kreis, district of Germany
 Makin Airport, Kiribati (IATA code "MTK")

See also
 MTK-2, Russian version of Baudot telegraphy code
 Erzsébeti Spartacus MTK LE or ESMTK (), football club in Pesterzsébet, Hungary