Tityrus may refer to:
- The tityrus, an ovine beast in Medieval heraldry and Greek legend
- Tityrus, the father of the Amazon Helene in Greek mythology
- Tityrus, the shepherd in Virgil's Eclogues, or Virgil himself
- Tityrus, a pseudonym used by Edmund Spenser for Geoffrey Chaucer in The Shepheardes Calender
- Tityrus the pseudonym of J.A.H. Catton, editor of the Athletic News
- An alternative name for the Musimon, used in European heraldry to symbolize one in authority who leads with strength
- Lycaena tityrus, binomial name for the sooty copper, a butterfly