Eryx

Eryx may refer to:
 * Eryx (Sicily), an ancient city in Sicily, the modern Erice, Italy
 * Mount Eryx, upon which the city stood, the modern Mount Erice
 * Eryx (mythology), a mythological king of the Sicilian city of Eryx, and boxer killed by Heracles
 * Eryx (missile), an anti-tank missile
 * Eryx (snake), a genus of snakes
 * "In the Walls of Eryx", a short story by H. P. Lovecraft and K. J. Sterling