Rock River may refer to:

• Rock River (Illinois), a tributary of the Mississippi River in Wisconsin and Illinois in the USA
• Rock River (Iowa), a tributary of the Big Sioux River in Minnesota and Iowa in the USA
• Rock River (Michigan), any of three rivers in Michigan, USA
• Rock River (Lake Champlain), a tributary of Lake Champlain in northern Vermont, USA
• Rock River (West River), a tributary of the West River in southern Vermont
• Rock River Township, Michigan, USA
• Rock River, Wyoming, USA
• Rock River Arms, a firearms company
• Little Rock River, in Minnesota and Iowa in the United States

Rock (rivière)