OCB may refer to:

Arts, entertainment, and media

  • O.c.b. (album), a 2009 album by O.S.T.R.
  • "O.C.B.", a song by Joey Badass from his 2015 album B4.Da.$$
  • OCB, a song by Billy Ze Kick et les Gamins en Folie on their 1993 self-titled album
  • OCB, a song by Malaa
  • OCB, abbreviation of The Oxford Companion to Beer
  • Orange Catholic Bible, a fictional book from the Dune universe created by Frank Herbert

Brands and enterprises

  • Odet-Cascadec-Bolloré, a brand of cigarette rolling papers manufactured by Republic Tobacco
  • Old Country Buffet, American restaurant chain
  • Orient Commercial Joint Stock Bank (OCB), a large bank located in Vietnam

Sports

  • Óquei Clube de Barcelos, a rink hockey team from Barcelos, Portugal
  • Orlando City B, a soccer team in Florida, United States

Other uses

  • OCB mode, a mode of operation for cryptographic block ciphers
  • Oil circuit breaker, a form of circuit breaker using oil as an insulating medium
  • Oligoclonal bands, bands of immunoglobulins that are seen in a patient's serum or CSF
  • Operations Coordinating Board (1953–1961), a committee of the United States Executive
  • Ordinary course of business, a term in law covering the usual transactions, customs and practices of a certain business and of a certain firm
  • Organizational citizenship behavior, a special type of work behavior