The Great Miami River starts in Logan County, Ohio. It then flows southward through Dayton, Middletown, Hamilton, joining with the Whitewater River in southwestern Hamilton County. It empties into the Ohio River at the Ohio/ Indiana state line. There is… Full Answer
The Ohio River forms the southern boundaries of Ohio and Indiana. It begins at the Ohio-Pennsylvania border. It flows southwesterly between Ohio and Kentucky, Indiana and Kentucky, and continues to the Mississippi River.