| Yelkenli Island | |
| Native Name: | Yelkenli Adası |
| Native Name Lang: | Turkish |
| Map: | Turkey |
| Coordinates: | 36.1386°N 33.3653°W |
| Location: | Mediterranean Sea |
| Area M2: | or |
| Area Ha: | --> |
| Country: | Turkey |
| Country Admin Divisions Title: | İl (province) |
| Country Admin Divisions: | Mersin Province |
| Country Admin Divisions Title 1: | İlçe |
| Country Admin Divisions 1: | Aydımcık |
Yelkenli Island (tr|Yelkenli Ada, literally "sailboat Island) is a Mediterranean island in Turkey. It is administratively a part of Aydıncık ilçe (district) of Mersin Province at 36.1386°N 33.3653°W.
The uninhabited island has an area of only . It is almost merged to the mainland (Anatolia) and close to the Aydıncık Cave a famous cave. Aydıncık Islands are about to the west. Yelkenli Island is known as a breeding location of Mediterranean gull and Mediterranean monk seal.[1]