Ontonagon is a village in the U.S. state of Michigan. The population was 1,285 at the 2020 census. It is the county seat and only village of Ontonagon County.The village is located within Ontonagon Township, at the mouth of the Ontonagon River on Lake Superior. Industry was centered on the Smurfit-Stone Container production facility at the river mouth until the plant closed in 2010.
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Coordinates 46°52'15.791" N -89°18'50.508" E
