Keratsini (Greek: Κερατσίνι) is a suburban town in the western part of the Piraeus regional unit, which in turn is a part of the Athens Urban Area.

[3] Keratsini is situated on the Saronic Gulf coast, 3 km (1.9 mi) northwest of Piraeus and about 9.5 kilometres (6 miles) west of Athens.

Keratsini has its own non-professional choir (mixed voices, SATB).

Keratsini hosts the football club Keratsini FC with earlier presence in Gamma Ethniki and the basketball club Faros Keratsiniou B.C.

Keratsini is twinned with Prešov, Slovakia, since 1994.