Foça (from Greek: Φώκαια, "Phocaea") is a town and district in Turkey's İzmir Province, on the Aegean coast.

The town of Foça is situated at about 69 km (43 mi) northwest of İzmir's city center. The district also has a township with its own municipality named Yenifoça (literally "New Foça"), also along the shore and at a distance of 20 km (12 mi) from Foça proper. For this reason, Foça itself is locally often called as Eskifoça ("Old Foça") in daily parlance. The ancient city of Phocaea (Greek: Φώκαια) is located between the two modern Foças.

Eski Foça stretches along two bays; a larger one named Büyükdeniz ("Greater Sea") and a smaller cove within that large one, named Küçükdeniz ("Smaller Sea"), where the medieval castle is also located.
Many parts of the district are under strict environmental protection, due to the value of the flora and the fauna, and the beauty of the small bays and coves, especially between Foça and Yenifoça. Therefore, a judicious way to get to know the district would be by boat tours regularly organized in partance from the town center. Because of the protective measures, new constructions are not permitted in many parts of the district and Foça is set to preserve its unique characteristic as composed principally of old houses.

The construction project for a 300-boat capacity marina in Foça is recently tendered and started, upon the completion of which the town is expected to open to more active international tourism.

Foça is the site of one of three marine protected areas established in Turkey for the preservation of the Mediterranean Monk Seal, a heavily endangered species of sea mammals.