The Kokemäenjoki is a river in southwestern Finland.
The river originates at Lake Liekovesi in the Pirkanmaa region, and flows 121 kilometres (75 mi) to the Gulf of Bothnia at Pori in the Satakunta region.
Primary tributaries of Kokemäenjoki are the Loimijoki, Kauvatsanjoki and Harjunpäänjoki rivers.
