BOC is the abbreviation of:

• Battle of Chancellorsville, during the American Civil War
• Biology of the Cell, an academic journal in biology
• Blackbird Owners Club, Motorclub for people who own a Honda CBR1100XX Super Blackbird and/or Honda X-11
• Bloque Obrero y Campesino, (Spanish: "Workers and Peasants' Bloc"), a former leftwing group in Spain, associated with the international Right Opposition, extant from 1931 to 1935
• BOC (gene), human gene
• BOC Challenge, now renamed the Velux 5 Oceans Race, a round-the-world single-handed sailing yacht race named after its then main sponsor BOC
• Body of Christ, a term in Christian theology with two separate connotations
• Bottom of container, a parachute deployment system.
• British Overseas citizen, one kind of British nationality
• tert-Butoxycarbonyl, abbreviated as "Boc", "BOC" or "t-Boc", a protecting group used in organic chemistry

Banks:

• Bank of Canada, Canada's central bank
• Bank of Ceylon, a major government-owned commercial bank in Sri Lanka
• Bank of China, a major state-owned bank in the People's Republic of China
• Bank of Cyprus, a major Cypriot financial institution

Companies:

• Bell Operating Company, any one of the 24 local telephone companies that AT&T either owned or had a stake in prior to January 1, 1984
• Board of Certification, Inc., a corporation that issues certifications for entry-level Athletic Trainers
• BOC (company), British based industrial gas company, known as Brin's Oxygen Company prior to 1906, and the British Oxygen Company prior to 1975

Film:

• Bride of Chucky

Music:

• Baltimore Opera Company, an opera company in Baltimore, Maryland, United States
• Blue Öyster Cult, an American psychedelic/heavy metal band
• Boards of Canada, a Scottish electronic music duo
• Boston Opera Company, an opera company in Boston, Massachusetts
• Bump of Chicken, a Japanese rock band

Names:

• Emil Boc, Romanian politician

Organizations:

• Baystate Organic Certifiers, which is an organic-certifying agent owned by Massachusetts Independent Certification, Inc. (MICI) and accredited by National Organic Program (NOP)
• Bird Observation & Conservation Australia, an Australian birding association
• British Ornithologists' Club, aims to promote discussion between members and others interested in ornithology, and to facilitate the dissemination of scientific information concerned with ornithology
• British Orthodox Church, an autonomous Oriental Orthodox Church under the Coptic Orthodox Patriarchate of Alexandria
• Bulgarian Olympic Committee, the National Olympic Committee of Bulgaria, part of the International Olympic Committee
• Bulgarian Orthodox Church, an autocephalous Eastern Orthodox Church with adherents in the Republic of Bulgaria and worldwide
• Bureau of Customs, a Philippine government agency under the Department of Finance

Places:

• Bay of Campeche, a bay in southwestern Gulf of Mexico
• Boca Raton, Florida
  • Boca Raton station (Brightline)

Technology:

• Binary offset carrier modulation - a digital modulation employed in Galileo and modernized GPS systems

Television:

• Beyond Our Control, an American television series