Ōyamazaki is a town located in Otokuni District, Kyoto Prefecture, Japan. As of 1 September 2023, the town has an estimated population of 16,219 in 6722 households and a population density of 2700 persons per km². The total area of the town is 5.97 square kilometres (2.31 sq mi).

Kyoto Prefecture is a prefecture of Japan located in the Kansai region of Honshu. Kyoto Prefecture has a population of 2,561,358 and has a geographic area of 4,612 square kilometres (1,781 sq mi). Kyoto Prefecture borders Fukui Prefecture to the northeast, Shiga Prefecture to the east, Mie Prefecture to the southeast, Nara Prefecture and Osaka Prefecture to the south, and Hyōgo Prefecture to the west.