Great Miami River
 The Great Miami River (also called the Miami River) (Shawnee: Msimiyamithiipi ) is a tributary of the Ohio River approximately 160 miles (260 km) long in southwestern Ohio in the United States. The Great Miami flows through Dayton Piqua Troy Hamilton and Sidney.The river is named for the Miami an Algonquian-speaking Native American people who lived in the region during the early days of European settlement.The region surrounding the Great Miami River is known as the Miami Valley.