Didim, which was a district in 1991, has the shape of a peninsula bordered by the province of Muğla in the east, the Aegean Sea in the west and south, Bafa Lake in the north and the Menderes River, and its area is around 402 km2. Situated within the borders of Aydın, Didim is an important tourism center 70 km from Kuşadası and 110 km from Bodrum. Located on one of the two peninsulas surrounding the Güllük Bay (the other is the Bodrum peninsula), Didim has dozens of bays, almost all of which are beaches, on the 90-kilometer coastline. The most important of these bays is undoubtedly Altınkum, which is just in front of the hotels region and one of the world famous beaches of the Aegean.

Didim has a great advantage due to its location. Many settlements of the Aegean, and therefore of the ancient world, are at a distance that can be visited with daily tours. For example, Miletus, the ancient city of philosophers, is only 20 km from Didim. distance. Tales, one of the seven wise men of this age, lived in Anaksimandros, philosopher and historian Hekaitos, city planner and architect Hippodamos Milet, who made the world's first map. The city, which was located by the sea when it was founded, is now in the middle of the plain due to the alluviums carried by the Büyük Menderes river. Another work of the Menderes River is Bafa Lake, 30 km from the city center. While Bafa was once a bay of the Aegean Sea, it is a settlement where the river has been turned into a lake after being disconnected from the sea with the alluviums it carries. 15 km from Didim. Akbuk is a cute holiday region where blue and green embrace.

Didim; Due to its low humidity in the air and its geographical structure, it is one of the two regions in the world that are good for asthma disease. Didim, which has 90 km of coastline, is in a very hot climate zone, but low humidity is a good option for those who complain of overwhelming heat in summer.

Didim is a district that is suitable for the Mediterranean climate type. According to this climate, summer months are hot and dry, winter months are warm and rainy. Under the influence of the Mediterranean climate, small shrubs like maquis formed in the region. Under these conditions, fruits and vegetables also grow in the district.