The letters CMQ' may represent any of the following:
- CMQ have been used as call letters for the following broadcasting stations in Havana, Cuba:
- the pre-1959 CMQ radio and television network
- Radio stations CMQ (AM) and CMQ-FM: currently Radio Rebelde
- Television station CMQ-TV channel 6: currently Cubavision International
- The IATA airport code for Clermont Airport in Clermont, Queensland, Australia
- Communauté métropolitaine de Québec (Quebec Metropolitan Community)
- Collège des Médecins du Québec (Quebec College of Physicians)
- Club Mitsubishi Québec (Quebec Mitsubishi auto Club)
- The Australian Securities Exchange code for Chemeq
- The trade publication Canadian Metallurgical Quarterly; see Canadian Institute of Mining, Metallurgy and Petroleum
- The publication Church Music Quarterly, the magazine of the Royal School of Church Music (RSCM)
- CMQ is also an acronym meaning cutting myself quietly
- CMQ Certified Manager of Quality