The deities of other Dungeons & Dragons campaign settings, including those of the default (or "core") setting for the Dungeons & Dragons game, are not generally a part of Forgotten Realms. However, there is some overlap, especially among the deities of nonhuman races. Lolth, the principal deity of the drow in the Forgotten Realms, is specifically described as being the same deity as Lolth in other campaign settings. No mention is made as to whether other deities shared between Forgotten Realms and other campaign settings are intended to represent the same divine entity.
Deities are included in this list only when documented in a Forgotten Realms-specific source or otherwise clearly indicated as existing in the setting. For deities in the core setting, see List of deities of Dungeons & Dragons.
Lord Ao is the Overdeity of the Forgotten Realms. He alone can allow new deities to join the pantheons of Forgotten Realms. However, he does not acknowledge mortal worshippers or grant spells, interacting with mortals only during the most unusual of circumstances, such as the Time of Troubles. However, it is made clear that even Lord Ao has his own master at the end of Waterdeep, the third book of The Avatar Series.
The Circle of Greater Powers consists of all the greater gods in the AD&D Forgotten Realms theological pantheon. Created by Lord Ao, the greater gods have a duty to preserve the balance between Chaos and Order. The Circle of Greater Powers have always come together to meet for important reasons such as the capture of Kezef the Chaos Hound for the preservation of the balance or for the trial of another god for not carrying out the duty under their portfolio such as the trial for Cyric the Mad.
The Faerûnian pantheon includes most deities worshipped by humans in Faerûn, the continent that forms the primary focus of the Forgotten Realms campaign setting. Many deities in this pantheon originated in separate human cultural pantheons which have since blended and combined, while others are mortals ascended to divinity or arrivals to Abeir-Toril from other worlds or settings through magical means.