Aydın is a city in and the seat of Aydın Province in Turkey's Aegean Region. The city is located at the heart of the lower valley of Büyük Menderes River at a commanding position for the region extending from the uplands of the valley down to the seacoast. The city forms the urban part of the Efeler district, with a population of 259,027 in 2022. Aydın city is located along a region which was famous for its fertility and productivity since ancient times. Figs remain the province's best-known crop, although other agricultural products are also grown intensively and the city has some light industry.

Aydın Province is a province and metropolitan municipality of southwestern Turkey, located in the Aegean Region. Its area is 8,116 km2, and its population is 1,148,241 (2022). The provincial capital is the city of Aydın. Other towns in the province include the summer seaside resorts of Didim and Kuşadası.