BC

BC may refer to:
 * Before Christ, an epoch used in dating years prior to the estimated birth of Jesus

Geography

 * Baja California, a state in Mexico
 * Basque Country (greater region), a nation between Spain and France
 * Bell Centre, an arena in Montreal, Quebec, Canada
 * Botswana's WMO country code and FIPS 10-4 code
 * British Columbia, the westernmost province of Canada

Schools

 * Bakersfield College, a college in Bakersfield, California
 * Baghdad College, a high school, Baghdad, Iraq
 * Bergen Catholic High School, a high school in Oradell, New Jersey
 * Benedictine Military School, a high school in Savannah, Georgia
 * Boston College, a university in Chestnut Hill, Massachusetts
 * Boston College Eagles. this university's athletic program
 * Brazosport College, a college in Lake Jackson, Texas

Businesses and organizations

 * BC Card, Korean credit card company
 * Bella Center, a conference center in Copenhagen, Denmark
 * Brasseries du Cameroun, a brewery in Cameroon
 * British Council
 * Brunswick Corporation's NYSE ticker symbol
 * Basilian Chouerite Order, a religious order
 * Borough Council, a class of second tier council in the United Kingdom
 * Bureau of Corrections (Philippines), an agency of the Department of Justice of the Philippines

Science and technology

 * bc programming language, an arbitrary-precision calculator language
 * Backcrossing, a crossing of a hybrid with one of its parents, or a genetically similar individual
 * Ballistic coefficient, a measure of air drag on a projectile
 * Base curve radius, a parameter of a contact lens
 * Battle command, a military process
 * Bayonet cap, a standard light bulb connection
 * Black carbon, a carbonaceous component of soot
 * Buoyancy compensator (diving), a piece of scuba diving equipment

Transportation

 * Belaruskaja Čyhunka, the national railway company of Belarus
 * NZR BC class, a steam locomotive classification of the New Zealand Railways Department
 * Skymark Airlines' IATA airline code

Other uses

 * B.C. (comic strip), a comic strip by Johnny Hart, and one of its characters
 * BC (video game), a cancelled video game by Lionhead Studios
 * BC Powder, a brand of pain reliever
 * Bliss bibliographic classification, a library cataloguing system
 * BookCrossing, a website that encourages leaving books in public places to be found by others
 * Brassocattleya or Bc, an orchid genus
 * Business continuity
 * Baccalaureus or bc, a Bachelors' degree in the Netherlands
 * Blind carbon copy (Bcc:), the practice of sending an e-mail to multiple recipients without disclosing the complete list of recipients
 * BC The Archaeology of the Bible Lands, BBC television series
 * British Citizen, a category of British nationality