A high king is a type of king ranked above other monarchs. High King may also refer to:

• High-King, a Japanese pop idol group
• High King Mountain Ski Area, a ski resort in Austria
• High King of Ireland, a historical title
• Hochkönig (English: High King), the highest mountain in the Berchtesgaden Alps, Austria
• The High King, a 1968 novel by Lloyd Alexander
• The High Kings, an Irish folk band

• Halls of the High King, a Dungeons & Dragons module
• The High King's Tomb, a 2007 novel
• Adipati (disambiguation), Sanskrit title, literally "high king"
• King of Kings (disambiguation)
• Maharaja (disambiguation), title of Indian kings, literally "great king"