| Yumurtalık Island | |
| Native Name: | Yumurtalık Adası |
| Native Name Lang: | Turkish |
| Map: | Turkey |
| Coordinates: | 36.7692°N 35.7969°W |
| Location: | Mediterranean Sea |
| Area M2: | or |
| Area Ha: | --> |
| Country: | Turkey |
| Country Admin Divisions Title: | İl (province) |
| Country Admin Divisions: | Adana Province |
| Country Admin Divisions Title 1: | İlçe |
| Country Admin Divisions 1: | Yumurtalık |
Yumurtalık Island (also known as Atlas Island) is a small Mediterranean island in Yumurtalık ilçe (district) of Adana Province, Turkey.The midpoint of the island is at 36.7692°N 35.7969°W. It is situated about to the east of the port.
Its surface area is about . There is a small castle in the north of the island. The castle was built in the 11th century, [1] during the late Byzantine or Cilician Armenia era. It faces the castle in the main land (Aegeae). It was an auxiliary unit of the port. [2]
Sometimes the island is also called Kızkalesi with the very same story of the Kızkalesi (castle) in Mersin Province.