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

• Winooski River in Vermont, from the Abenaki word for "onion"

This disambiguation page lists articles associated with the title Onion River.
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