Ontonagon (/ˌɒntəˈnɑːɡən/ ON-tə-NAH-gən) is a village in the Upper Peninsula of the U.S. state of Michigan.

Industry was centered on the Smurfit-Stone Container production facility at the river mouth until the plant closed in 2010.

[6] Ontonagon is the westernmost incorporated community in the United States that uses the Eastern Time Zone, being located on the same line of longitude as Hattiesburg, Mississippi.

This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters.

In 2020, its racial makeup was 92.92% non-Hispanic white, 0.47% Native American, 0.62% Asian, 0.08% Pacific Islander, 5.91% other, and 1.71% Hispanic or Latino of any race.

41.1% of all households were made up of individuals, and 19.3% had someone living alone who was 65 years of age or older.