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QCA may refer to:

  • Qualifications and Curriculum Authority, formerly an executive non-departmental public body (NDPB) of the Department for Education in the United Kingdom
  • Qualitative comparative analysis, a technique for solving the problems that are caused by making causal inferences on the basis of only a small number of cases
  • Quantum cellular automata, any one of several models of quantum computation
  • Queensland College of Art, a specialist arts and design college located in South Bank, Brisbane, and Southport, Gold Coast Australia
  • Queensland Cricket Association
  • Quezon City Academy, a Secondary school in Quezon City, Philippines
  • Quoted Companies Alliance, a not-for profit organisation representing small businesses
  • Quad Cities Area, is a geographic region of the Mid-Mississippi Valley of the United States that includes several communities in the states of Iowa and Illinois.
  • Quantum dot cellular automaton
  • QCA, IATA code of Mecca, Saudi Arabia's airport