Keratsini (Greek: Κερατσίνι) is a suburb in the western part of the Athens-Piraeus agglomeration, Greece. Since the 2011 local government reform it is part of the municipality Keratsini-Drapetsona, of which it is the seat and a municipal unit.
Keratsini is situated on the Saronic Gulf coast, 3 km northwest of Piraeus city centre and about 10 kilometres (6 miles) west of Athens city centre. The coastal area consists mainly of port facilities, part of the Port of Piraeus.
Keratsini has its own non-professional choir (mixed voices, SATB). It has participated many times in festivals all around Greece. The town has its own choir festival called international song festival.