Datça is a district of Muğla Province in south-west Turkey, and the center town of the district. The center is situated midway through the peninsula which carries the same name as the district and the town.
The Datça Peninsula is an 80 km-long, narrow peninsula in southwest Turkey separating the Gulf of Gökova to the north from the Gulf of Hisarönü to the south. The peninsula corresponds almost exactly to the administrative district of Datça, part of Muğla Province. The town of Datça is located at its half-way point.
In the early 20th century, it was called the Reşadiye Peninsula other names include the Dorian or Cnidos Peninsula or the Chersonisos Cnidia.