Ōyamazaki (大山崎町 Ōyamazaki-chō) is a town located in Otokuni District, Kyoto Prefecture, Japan.
As of April 1, 2008, the town has an estimated population of 15,203 and a density of 2,527 persons per km². The total area is 5.97 km².
The Daihatsu Kyoto plant is in Ōyamazaki.
The town has two railway stations: Yamazaki Station on the JR Kyoto Line and Ōyamazaki Station on the Hankyu Kyoto Main Line.
For road traffic, Ōyamazaki Interchange of the Meishin Expressway, where the Keiji Bypass merges to the Meishin, is located in the town. National Highways Route 171 and Route 478 also provide access to the town.