CB and variants may refer to:
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Places
- CB postcode area or Cambridge postcode area, England
- Cambodia (LOC MARC code, obsolete FIPS Pub 10-4 country code and obsolete NATO digram CB)
- Centura București, a ring road of Bucharest, Romania
- Colegio Bolivar, an American school in Cali, Colombia
- Province of Campobasso, Italy
People
- Chris Brown (born 1989), American R&B singer
- Henry Campbell-Bannerman (1836–1908), UK prime minister 1906–1908, known as CB
Brands and enterprises
- Carte Bancaire, a bank card brand
- Chaturbate, a pornographic webcam website
- Christianssands Bryggeri, a Norwegian brewery
- ScotAirways (IATA airline code CB)
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Science and technology
Computing and telecommunications
- Cell Broadcast, in GSM mobile networks
- Citizens band radio (CB radio), short-distance radio
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Other uses in science and technology
- Columbium (Cb), an obsolete name for the element niobium
- Cumulonimbus cloud (Cb), a type of cloud
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Sea vessels
- CB-class midget submarine, WWII, Italy
- Block coefficient (C<sub>b</sub>), a parameter describing the shape of a ship's hull
- A retired US Navy hull classification symbol: Large cruiser (CB)
Sports
Positions
- Cornerback, a position in American football
- Centre-back, a defender position in Association football
Titles
Companion of the Order of the Bath, UK honour
Other uses
- CB, dominical letter for a leap year starting on Friday
- Construction Battalion (CB or "Seabee"), a US Navy engineering unit
See also
- C♭ (musical note)
- C♭ major
- C-flat minor