Didim is a municipality and district located in the Aydın Province of western Turkey. Situated on the Aegean coast, it covers an area of 424 km² and had a population of 97,000 as of 2022. The town is positioned approximately 123 km (76 mi) from the provincial capital city of Aydın.
The area serves as a popular seaside holiday resort. It is also notable for its historical significance as the site of the antique city of Didyma, which features the ruins of the Temple of Apollo.