Hasanbeyli is a town located in the Osmaniye Province within the Mediterranean region of Turkey. It serves as the administrative seat of the Hasanbeyli District and has a recorded population of 2,638 as of 2022.
The area is notable for its historical geography, specifically featuring a badly damaged medieval watchtower situated near the town. This structure was historically used to guard a strategic route passing through the Amanus Mountains, connecting Cilicia Pedias to Gaziantep.