Aliağa is a municipality and district of İzmir Province, Turkey. Its area is 379 km2, and its population is 104,828 (2022). The town is situated at about 50 km (31 mi) north of İzmir. Aliağa has a large port, mainly for oil and bulk cargo. Its economic activity is based on tourism, shipbreaking, and an oil refinery.

İzmir Province is a province and metropolitan municipality of Turkey in western Anatolia, situated along the Aegean coast. Its capital is the city of İzmir, which is in itself composed of the province's central 11 districts out of 30 in total. To the west, it is surrounded by the Aegean Sea, and it encloses the Gulf of Izmir. Its area is 11,891 square kilometres, and its population is 4,462,056 (2022). Neighboring provinces are Balıkesir to the north, Manisa to the east, and Aydın to the south. The traffic code of the province is 35.