CQ may refer to:
Locations:
- Central Queensland
- Chongqing, China
- Northern Mariana Islands: FIPS Pub 10-4 and obsolete NATO digram
Media, Publications
- Congressional Quarterly, a publisher of print and online daily and weekly news about Congress and politics
- CQ Press, a publishing firm for academic and educational markets
- CQ Amateur Radio
- CQ ham radio
- The China Quarterly
Other:
- cadit quaestio, Latin for "the question falls", used as a legal term
- In copy-editing, signifies that an unusual-looking spelling or word usage has been double-checked
- casu quo, the Latin for "in that case" or "respectively"
- CQ (call), a code used by radio operators
- CQ (film), a 2001 film
- Cultural Quotient
- Norinco CQ
- Charge of Quarters, a military term
- Cissus quadrangularis, a plant from the grape family that is used for medicinal purposes
- Communication Quotient
- IBM Rational ClearQuest, a ticket-tracking system
- a shorthand for cheque
- Carrier qualifications for modern US Navy carrier air operations
- Constellation Airlines IATA airline designator
- post-nominal letters for Knight of the National Order of Quebec
- Cycling Quotient (www.cqranking.com), a ranking system for road race cycling following the principles of the UCI Road World Rankings that were discontinued in 2005.