D.515 is a north-to-south state road in southwestern Turkey, running from Selçuk in İzmir Province to Söke in Aydın Province.
It starts at the D.550 in Selçuk, and ends at the D.525 in Söke.
The road is entirely a dual carriageway, and passes through the key tourist area of Kuşadası. The road passes Selçuk–Efes Airport, and provides a road link between Kuşadası and Ephesus. It passes many holiday resort hotels, and Adaland Aquapark.