Miami River may refer to:

In Ohio

• Great Miami River, a tributary of the Ohio River
• Little Miami River, a tributary of the Ohio River
• Maumee River, referred to in the Ohio Constitution as the Miami River of the Lake

Elsewhere

• St. Joseph River (Lake Michigan), a river; formerly Rivière des Miamis (River of the Miamis)
• Miami River (Florida), a tributary of Biscayne Bay
• Miami River (New York), a tributary of Lewey Lake
• Miami River (Oregon), a tributary of Tillamook Bay