Isthmian Games one of the four great festivals of ancient Greece, the others being the Olympian, Pythian, and Nemean Games. The games were held on the Isthmus of Corinth in the spring of every second year beginning in 582 B.C.

The Isthmian Games, held in honor of the god Poseidon, consisted of athletic, chariot-driving, horseback-riding, and musical contests. Winners were awarded parsley wreaths or pine branches. After Corinth was destroyed by the Romans in 146 B.C., the games were continued in nearby Sicyon. They were restored to Corinth when the city was rebuilt by Julius Caesar in 46 B.C. and continued to be held until about 300 A.D.