Sicyon was a celebrated Greek city in the Peloponnesus on the Gulf of Corinth. It was an ancient city whose importance and wealth increased for a time under Roman favor.
Sicyon is mentioned in 1 Maccabees among the countries and cities to which the Roman consul Lucius wrote, asking them to maintain friendly relations with the Jews.
Sicyon stood about eighteen miles west of Corinth on the south side of the Gulf of Corinth. It was once a chief city of the region, and Roman authorities added to its territory and assigned it direction of the Isthmian games.