6Q or 6-Q may refer to: * 6Q, IATA code for Slovak Airlines * Renault 6Q, a series of engines by Renault * 6Q, a six-cylinder inline engine used in the Nord Pingouin * 6Q-01, used in the Caudron Simoun * 6Q-09, used in the Caudron Simoun * 6Q-10, used in the Nord Noralpha * 6q, an arm of Chromosome 6 (human) * Task Group 6Q of the International Telecommunication Union, a developer of PEAQ * 6Q, the production code for the 1984 Doctor Who serial Planet of Fire