OCA or Oca may refer to: Places and jurisdictions The ancient town and bishopric Oca in Asia Minor (present Asia Turkey), now a Latin Catholic titular see The former Spanish Oca, modern Villafranca Montes de Oca, also see of a medieval bishopric (Auca), now a Latin Catholic titular see Oca (river), a tributary of the Ebro, Spain, having its source in the comarca of Montes de Oca Côte d'Azur Observatory, French name: Observatoire de la Côte d'Azur Cerro Armazones Observatory Orange County Airport, several airports in the United States Oregon Coast Aquarium Iruña de Oca, Spanish municipality Business and society Odisha Cricket Association, state cricket body of BCCI Open Content Alliance, consortium of organizations contributing to a publicly accessible archive of digitized texts Optimum currency area, geographical region which efficiently shares a single currency Oregon Citizens Alliance, conservative Christian political activist organization Organic Consumers Association, consumer protection and organic agriculture advocacy group Organization of Chinese Americans, national Asian Pacific American social and civic organization Oxford Conservative Association, student political organisation at the University of Oxford Education Oakland Charter Academy, a member school of Amethod Public Schools Ontario College of Art, former name for OCAD University Open College of the Arts Government Court of Appeal for Ontario, frequently referred to as the Ontario Court of Appeal Office of Consumer Affairs (Canada), government agency of Industry Canada Olympic Council of Asia, governing body of sports in Asia Organised and Financial Crime Agency of New Zealand, formerly known as the Organised Crime Agency Organized Crime Agency of British Columbia (1999–2004), predecessor of the Combined Forces Special Enforcement Unit Outback Communities Authority, an authority providing municipal services to communities in Outback South Australia Medicine OCA1, a gene associated with oculocutaneous albinism Oculocutaneous albinism, a form of albinism involving the eyes and skin Religion Orthodox Church in America, autocephalous Eastern Orthodox Church in North America Oxford Capacity Analysis, also known as the American Personality Analysis, a personality test used in Scientology Oca (bishopric), a now titular Catholic see in Asia Minor Technology Odoo Community Association, an organization supporting the Odoo (formerly OpenERP) community Open Control Architecture, network control protocol for audio and video devices (AES70) Optically Clear Adhesives, bonding agents used for light-emitting devices like OLED and LEC; see Liquid optically clear adhesive Oracle Certified Associate, a level of the Oracle Certification Program Other uses Oca (structure), a kind of Brazilian indigenous dwelling Oxalis tuberosa,