This is a list of deities of Dungeons & Dragons, including all of the 3.5 edition gods and powers of the "Core Setting" for the Dungeons & Dragons (D&D) roleplaying game. Religion is a key element of the D&D game, since it is required to support both the cleric class and the behavioural aspects of the ethical alignment system – 'role playing', one of three fundamentals. The pantheons employed in D&D provide a useful framework for creating fantasy characters, as well as governments and even worlds. Dungeons and Dragons may be useful in teaching classical mythology. D&D draws inspiration from a variety of mythologies, but takes great liberty in adapting them for the purpose of the game. Because the Core Setting of 3rd Edition is based on the World of Greyhawk, the Greyhawk gods list contains many of the deities listed here, and many more.

The first official publication to detail god-like beings for use in the Dungeons & Dragons game was Gods, Demi-Gods & Heroes, published in 1976 as the fourth supplement for the original edition. This work was superseded by the Deities & Demigods sourcebook, which was first published in 1980. The first printing included the Cthulhu Mythos, but both this and the Melnibonéan mythos were removed by the third printing because of potential copyright issues. While some non-human deities originated in the Supplement I: Greyhawk (1975) and the Monster Manual (1977), Deities & Demigods and a series of articles in Dragon #58-63 (released in 1982) were the major sources for information on these deities and "brought the total nonhuman deity count up to about 50". In 1985, when the sourcebook was reprinted, Deities & Demigods was renamed Legends & Lore. On this change, Gary Gygax wrote it was due to "bowing to pressure from those who don't buy our products anyway" – Shannon Appelcline explained this was a reference to "fundamentalist religious groups, who had by then begun actively attacking TSR under names such as" Bothered About Dungeons & Dragons (B.A.D.D.). Nick Ozment of Black Gate highlighted the game did use "one aspect of Judeo-Christian myth: the devils and demons (although they can be found in many other mythologies as well)" so "puritanical fear mongers took this and ran with it". Ozment commented that "early editions were kinda silly" in terms of game mechanics for deities because even though the designers "assigned crazy-huge hit points and breathtakingly strong armor classes to the gods, said deities still had stats that could be overcome by powerful enough characters". He explained that "later editions of Deities and Demigods [...] ameliorated this 'big boss' mentality by introducing the concept that some gods that characters physically encountered were but avatars, 'aspects' or physical incarnations of gods who, being immortal and transcendent, could not really be killed".

In 1990, when Legends & Lore was revised for Advanced Dungeons & Dragons 2nd edition, the Babylonian, Finnish, nonhuman, and Sumerian content were removed to allow room for expansion of the remaining mythoi. Appelcline commented that this sourcebook "probably preserves more continuity from those 15 years of publication than any other D&D book". The disclaimer became stronger in this version of Legends & Lore by expanding from a general denial of philosophical intent to an explicit and detailed disavowal of religious judgment which Appelcline explained reflected TSR's heightened sensitivity to criticism from religious groups during Lorraine Williams' tenure. On the removed pantheons, he thought the "most surprising" was the removal of the nonhuman deities as "they represent some of the most original parts of the previous Deities & Demigods. However, TSR had decided that their first deities book should reflect the 'human experience'". Monster Mythology was then published in 1992 and it re-introduced detailed information on the deities of several non-human pantheons. This sourcebook "more than doubled the count of humanoid, demihuman, and monstrous deities".

The Faerûn pantheon for the Forgotten Realms campaign setting was more fully detailed in 1996–1998 with the publication of Faiths & Avatars (1996), Powers & Pantheons (1997) and Demihuman Deities (1998). Appelcline highlighted that many of the deities in Demihuman Deities either originated in Deities & Demigods or in Dragon articles, noting that means "about half of the Realms demihuman deities were created by Lawrence Schick and Roger E. Moore five to seven years before the Forgotten Realms became an official AD&D setting".

With the third edition of Dungeons & Dragons, a core pantheon was introduced; this was adapted from the Greyhawk pantheon. Deities and Demigods (2002) outlined various pantheons and included stat blocks for deities along with roleplay guidance on religions, the actions of deities in gameplay, and the creation of homebrew pantheons and religions. Co-designer James Wyatt explained that this sourcebook "owes a lot to the 1st Edition Deities and Demigods/Legends and Lore book, more so than the 2nd Edition version" but the introduction of "new material" meant not every pantheon could still be included so they "chose the pantheons that we felt were (a) most popular and (b) most ensconced in the popular culture of fantasy: the Greek, Norse, and Egyptian". Faiths and Pantheons (2002) was an abridged update of the previous Forgotten Realms deity focused trilogy; it uses the rules introduced in Deities and Demigods to outline "the portfolios of the many gods of the Realms" and adds stat blocks for "the avatars of the major deities". The sourcebook features a list of 115 Forgotten Realms gods, with "slight updates" for 3E compatibility. Appelcline thought its most notable addition was the inclusion of monstrous deities, such as the orc pantheon, which were previously detailed only in "non-Realms books like DMGR4: Monster Mythology (1992) and On Hallowed Ground (1996)".

The 4th Edition default pantheon included deities from the Greyhawk and the Forgotten Realms campaign settings, as well as several original gods. Although some gods are patrons of specific races, they are worshipped by all, and racial pantheons do not exist in this edition. Many lesser gods from previous editions (such as the Seldarine or most members of the dwarven pantheon) now have the status of Exarch, a demipower in service to a greater god.^{[citation needed]}

The 5th Edition Players Handbook (2014) included lists of deities from the Forgotten Realms, Greyhawk, Dragonlance, Eberron, and the deities derived from historical pantheons such as the Celtic deities and Norse deities. The historical deities have been removed "from their historical context in the real world and united into pantheons that serve the needs of the game". The 5th Edition Dungeon Master's Guide (2014) later provided the "Dawn War Deities" as a sample pantheon, an updated version of the main pantheon of 4th Edition. These updates included readjusting some of the alignments, because 5th Edition returned to the previous schema of nine alignments, as well as adding suggested cleric domains of the available domains from the PHB and DMG. The Sword Coast Adventurer's Guide (2015) then gave a more detailed overview of all the deities from the Forgotten Realm, including nonhuman deities. A more detailed and expanded overview of nonhuman deities was printed in the Mordenkainen's Tome of Foes (2018).

Deities in Dungeons & Dragons have a great variety of moral outlooks and motives, which have to be considered by cleric player characters. In some editions of the game, deities were given statistics, allowing mighty player characters to kill a god like a powerful monster. Every deity has certain aspects of existence over which it has dominion, power, and control. Collectively, these aspects represent a deity's portfolio. Additionally, each deity that can grant spells has multiple domains that give clerics access to extra spells and abilities from that domain. Which domains are associated with a deity is largely a function of the deity's portfolio.^{[citation needed]}