最上川
Yonezawa is located in the southeast corner of Yamagata Prefecture. The southern and eastern portions of the city are river basins surrounded by large mountains, forming the Yonezawa Basin. The southern portion of the city has a complex terrain with several rivers and alternating ridges and valleys orientated east to west. The Mogami River flows through the city. Part of the city is within the borders of the Bandai-Asahi National Park.