| Type: | neighbourhood |
| Province: | Mersin |
| District: | Erdemli |
| Kösbucağı | |
| Population Total: | 1,933 |
| Population As Of: | 2022 |
| Coordinates: | 36.6833°N 49°W |
| Elevation M: | 525 |
| Postal Code: | 33730 |
| Area Code: | 0324 |
Kösbucağı is a neighbourhood in the municipality and district of Erdemli, Mersin Province, Turkey.[1] Its population is 1,933 (2022).[2] It is a dispersed mountain village situated in forests. The distance to Erdemli is about and to Mersin. There are Roman and Byzantine ruins (including a bridge) around the village. However, the inhabitants are of Turkmen origin. The main economic activity of the village is farming. Citrus, various fruits and vegetables are produced. There is also a poultry farm in the village. Some village residents work in chromium mines next to the village.[3]