Caspian can refer to:

• The Caspian Sea
• The Caspians, the ancient people living near the Caspian Sea
• The Caspian region, the loosely-defined area surrounding the Caspian Sea
• The Caspian languages, Collection of languages and dialects of caspian people.
• The Caspian pony
• The Caspian Seal
• The Caspian tiger
• CASPIAN, or Consumers Against Supermarket Privacy Invasion and Numbering, a grass-roots consumer organization
• Caspian Dopamine Records
• Several birds, including the Caspian Tern and the Caspian Gull
• Caspian Sea Monster, the name applied by U.S. Intelligence to large Soviet wing-in-ground effect vehicles based in the Caspian Sea
• Caspian, an instrumental post-rock band
• In C. S. Lewis's Chronicles of Narnia series:
  • Caspian X, a prince of the Telmarines
  • Prince Caspian, a book in the Narnia series featuring Caspian X
  • The Chronicles of Narnia: Prince Caspian, a film based on the Prince Caspian book.
• Caspian, a fictional character on Highlander: The Series