| Type: | neighbourhood |
| Province: | Mersin |
| District: | Gülnar |
| Yarmasu | |
| Population Total: | 530 |
| Population As Of: | 2022 |
| Coordinates: | 36.3667°N 38°W |
| Elevation M: | 1300 |
| Postal Code: | 33702 |
| Area Code: | 0324 |
Yarmasu is a neighbourhood in the municipality and district of Gülnar, Mersin Province, Turkey.[1] Its population is 530 (2022).[2] It is situated to the southwest of Gülnar. The distance to Gülnar is and to Mersin is .