Patriarch Euthymius may refer to:
Patriarch Euthymius I of Constantinople (834–917) Patriarch Euthymius II of Constantinople (c. 1340–1416) Patriarch Evtimiy of Bulgaria (Euthymius of Tarnovo) (1325–1402) Euthymius II Karmah, 17th-century Melkite Patriarch of Antioch Euthymius III of Chios, 17th-century Melkite Patriarch of Antioch