Tiresias was a blind prophet in Greek mythology.

Tiresias may also refer to:

• Tiresias (ballet), by Constant Lambert
• Tiresias (horse)
• Tiresias (typeface)
• Teiresias algorithm
• Tirésias Simon Sam (1835–1916), President of Haiti
• Tom Driberg (1905–1976), pseudonymously Tiresias, British journalist, politician, and crossword compiler