Field theory may refer to:
Science Field (mathematics), the theory of the algebraic concept of field Field theory (physics), a physical theory which employs fields in the physical sense, consisting of three types: Classical field theory, the theory and dynamics of classical fields Quantum field theory, the theory of quantum mechanical fields Statistical field theory, the theory of critical phase transitions Grand Unified Theory
Social science Field theory (psychology), a psychological theory which examines patterns of interaction between the individual and his or her environment Field theory (sociology), a sociological theory concerning the relationship between social actors and local social orders