How many Jaws movies have there been?

There were four Jaws movies:

Jaws (1975)
Jaws 11 (1978)
Jaws 3-D (1983)
Jaws: The Revenge (1987)

The third Jaws movie starred Dennis Quaid, Jaws 3-D (1983).

The fourth and last, Jaws: The Revenge (1987) starred Michael Caine.