6Q or 6q 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
See also Q6 (disambiguation)