In feudalism, an overlord is a supreme lord; one who is the lord of other lords.

• Overlord is a quest in the Lord of Destruction expansion of Diablo II (Act 5, quest 1)
• The Overlords are a species in Arthur C. Clarke's Childhood's End
• Overlords are a type of unit in Blizzard's video-game Starcraft
• Operation Overlord was codename for the invasion of Normandy during World War II
• overlord is an indie-rock band
• An Evil Overlord is a type of fictional character.