Ontonagon ( is a village in the Upper Peninsula of the U.S. state of Michigan. The population was 1,285 at the 2020 census. It is the county seat of Ontonagon County, and is the only incorporated place within the 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.
Geography
According to the United States Census Bureau, the village has a total area of , of which is land and (3.89%) is water.
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. It also lies further west than Wyatt, Missouri, the easternmost community in the United States west of the Mississippi River.
Climate
This climatic region is typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. According to the Köppen Climate Classification system, Ontonagon has a humid continental climate, abbreviated "Dfb" on climate maps.
Demographics
{| class="wikitable"
|+ Ontonagon racial composition in 2020 of 2010, there were 1,494 people, 717 households, and 390 families residing in the village. The population density was . There were 910 housing units at an average density of . At the census of 2020, there were 1,285 people residing in the village. The population density was . There were 893 housing units at an average density of .
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.