Haci Osman köyü is a small village in the vilayet Balikesir, in the region of Manyas in Turkey.

This village was a farming community, not unlike many others in the world. What distinguished Haci Osman köyü from all the other farming villages in the world was the fact that, until 1992, it was one of the few villages where the inhabitants spoke the Ubykh language in their daily lives. The last speaker of Ubykh, Tevfik Esenc, was born, and died, in this village.

Other villages where Ubykh was spoken included Kirkpinar and Haci Yakup köyü.