The Battle of Crocus Field is a battle in the Third Sacred War, fought between the armies of Phocis, under Onomarchos, and the combined Thessalian and Macedonian army under Philip II of Macedon.

In the bloodiest battle recorded in Ancient Greek history, the Phocians are decisively defeated by Philip's forces.

Philip's victory secures his appointment as ruler of Thessaly, marking an important step in the rise of Macedon to political ascendancy in Ancient Greece.

Opinion among historians is divided as to the year of the battle; some favor 353 BCE, and others 352 BCE.