Cenchrea

millet, the eastern harbour of Corinth, from which it was distant about 9 miles east, and the outlet for its trade with the Asiatic shores of the Mediterranean. When Paul returned from his second missionary journey to Syria, he sailed from this port (Acts 18:18). In (Rom 16:1) he speaks as if there were at the time of his writing that epistle an organized church there. The western harbour of Corinth was Lechaeum, about a mile and a half from the city. It was the channel of its trade with Italy and the west.

EBD - Easton's Bible Dictionary