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