How many Greek gods are there?

12 major gods and thousands of lesser deities.

There are thousands of gods who were worshiped in Greek mythology and religion. The most popular are the 12 major Greek gods, also known as the Olympians, namely Aphrodite, Apollo, Aries, Artemis, Athena, Demeter, Dionysus, Hades, Hephaestus, Hera, Hermes, Hestia, Poseidon, and Zeus. There are also 15 primordial gods, 33 titans, the giants, and thousands more deities and personified concepts.