Halloween 4 or Halloween IV may refer to:
- Halloween 4: The Return of Michael Myers (1988), the fourth film in the Halloween franchise
- Halloween 5: The Revenge of Michael Myers, the fourth film in the 4-6 Timeline
- Halloween: Resurrection, the fourth film in the H20 Timeline
- Halloween Ends, the fourth film in the 2018 Timeline
- Halloween IV, the novelization of the 1988 film