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