Onion River

Onion River may refer to a waterway in the United States:


 * Onion River (Minnesota)
 * Onion River, a tributary of the St. Regis River in New York
 * Onion River (Sheboygan River), a tributary of the Sheboygan River in Wisconsin
 * Onion River, a tributary of Lake Superior in Wisconsin
 * Onion River, Vermont