Warcraft III: Reign of Chaos oyununda 4 ana ırktan toplam 24 karakter bulunmaktadır. İnsan Birliği (Human Alliance): Paladin, Archmage, Mountain King, Blood Mage. Ork Horde (Orcish Horde): Blademaster, Far Seer, Tauren Chieftain, Shadow Hunter. Ölümsüz Scourge (Undead Scourge): Death Knight, Lich, Dread Lord, Crypt Lord. Gece Elf Sentinels (Night Elf Sentinels): Keeper of the Grove, Priestess of the Moon, Demon Hunter, Warden. Ayrıca, nötr (neutral) karakterler de mevcuttur: Naga Sea Witch, Dark Ranger, Pandaren Brewmaster, Beastmaster, Pit Lord, Tinker, Firelord, Alchemist.