CQ may refer to:
Arts and entertainment CQ (film), a 2001 film La CQ, a Cartoon Network sitcom Cinémathèque québécoise, a Montreal film museum
People CQ (playwright) or C. Quintana, a Cuban-American playwright, poet, and writer Charles Q. Brown Jr., a retired United States Air Force general.
Places Cathedral Quarter, Belfast Cathedral Quarter, Derby Cathedral Quarter, Sheffield Central Queensland (geographical division of Queensland) Chongqing, China (Guobiao abbreviation CQ) Coal Quay, area in Belfast Northern Mariana Islands (FIPS Pub 10-4 or obsolete NATO digram CQ) Sark, Channel Islands (ISO 3166-1 alpha-2 exceptionally reserved code CQ for Sark)
Publications CQ Amateur Radio CQ ham radio CQ Press, a US publisher in government and politics The China Quarterly, a journal published by Cambridge University Press Congressional Quarterly, a US publishing company
Science and technology
Conjunctive query, in relational databases and database theory CQ (call), in radio communications, a general call, to anyone who receives it Norinco CQ, a variant of the AR-15 rifle Cissus quadrangularis, medicinal plant from the grape family Adobe Experience Manager, formerly CQ, a web content management system
Other uses
Cadit quaestio, Latin for "the question falls", in copy-editing means "has been checked" Carrier qualification, qualifications for modern US Navy carrier air operations Charge of Quarters, the military task of guarding the front entrance to a barracks Communication quotient, in business and organizational psychology Constellation Airlines (IATA airline designator CQ) Cultural Quotient, in business, education, government and academic research Knight of the National Order of Quebec (post-nominal letters CQ) Compaq, sometimes abbreviated as CQ