RMK may refer to: RMK-BRJ, an American construction consortium of four of the largest American companies rmk, the ISO 639-3 code for Romkun, a variant of Iski language Renmark Airport, the IATA code RMK Simrik Airlines, the ICAO code RMK Reichsmusikkammer, a music regulating company in Nazi Germany Radio Miyazaki K.K., a broadcasting station in Miyazaki Prefecture, Japan Robert Moses' Kin, an American dance company Republican Movement of Karelia, a Karelian regionalist and separatist organization