- This article is about the principal object of faith. For mythological beings, see gods.
God (known in other names such as Elohim, Yahweh, and Allah) is often conceived as the omnipotent, omniscient, omnipresent Supreme Being and principal object of faith in the three Abrahamic religions (Judaism, Christianity, and Islam). God has been mentioned in three of the series.
While explaining things to Percy Jackson, Chiron specifically differentiates God from the Olympian gods, saying that the latter are quite a smaller matter, and that they shall not deal with the metaphysical.
Magnus Chase says that it was just his luck that he ended up being a child of a Norse god and that if there was a God he was probably laughing at him. It is also mentioned that Hotel Valhalla uses The B.C.E./C.E. (Before Common Era/Common Era) system of dating instead of the B.C./A.D. (Before Christ/Anno Domini "year of the Lord") system due to Thor challenging Jesus to a duel and the latter never showing up.
- In the Percy Jackson: Sea of Monsters movie, Dionysus makes a humorous reference to Jesus Christ, and his ability of turning water into wine.
- In The House of Hades, Hazel also mentions the Devil, whom Magnus mentions as Satan in The Sword of Summer.
- In The Sword of Summer it is mentioned that Thor once attempted to challenge Jesus to a duel, but the latter never showed up.