Warcraft is a franchise of video games, novels, and other media created by Blizzard Entertainment. The series is made up of five core games: Warcraft: Orcs & Humans, Warcraft II: Tides of Darkness, Warcraft III: Reign of Chaos, World of Warcraft, and Hearthstone. The first three of these core games are in the real-time strategy genre, where opposing players command virtual armies in battle against each other or a computer-controlled enemy. The fourth and best-selling title of the franchise is a massively multiplayer online role-playing game (MMORPG), where players control their character and interact with each other in a virtual world. Warcraft is one of the highest-grossing video game franchises of all time, having grossed $11.2 billion in lifetime revenue, as of 2018.

Expansion sets were released for Warcraft II (Beyond the Dark Portal), Warcraft III (The Frozen Throne) and multiple expansions were released for World of Warcraft (The Burning Crusade, Wrath of the Lich King, Cataclysm, Mists of Pandaria, Warlords of Draenor, Legion, Battle for Azeroth and Shadowlands). World of Warcraft's ninth expansion, Dragonflight, released November 28, 2022.

At BlizzCon 2018 on November 2, 2018, Blizzard announced a remaster of Warcraft III entitled Warcraft III: Reforged featuring remodeled characters and graphics with a prospective release in 2019. The game was officially released on January 28, 2020.

All games in the series have been set in and around the world of Azeroth, a high fantasy setting. Initially, the start of the series focused on the human nations that make up the Eastern Kingdoms, and the Orcish Horde, which arrived in Azeroth via a dark portal, beginning the great wars. The Orcs came from another world, referred to as Draenor, the world that will be shattered into pieces by demonic magics during the events of Warcraft II, thereafter being known as Outland. Later on in the series the world of Azeroth was expanded, revealing the new continents of Kalimdor, Northrend, Pandaria, the Broken Isles, Kul Tiras, Zandalar, and the Dragon Isles, allowing the introduction of the Night Elves, Tauren, Pandaren, and other major races into the universe. The world of Azeroth also contains the traditional fantasy setting races of elves, dwarves, gnomes, orcs, and trolls. Unusually for the genre, all of these races are available to be played, whereas trolls and full-blooded orcs are usually presented in fantasy fiction as being solely antagonists for protagonists of the more "human-friendly" races.

The series spawned several books and other media, covering a broad range of characters and timelines in the Warcraft universe. A collectible card game was published, which offered those who bought booster packs a chance to gain access codes to limited in-game content in World of Warcraft. Comics have been released alongside the books, further covering parts of the universe's storyline. A short-lived, online subscription only magazine was available but later ceased publication after five issues. A film adaptation, Warcraft, was released in 2016.