Welcome to Ontonagon County ...Time Zone: Ontonagon County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time. The community of Ontonagon is the Seat for Ontonagon County. Ontonagon County was founded ?. Ontonagon was created by taking area from Chippewa and Houghton Counties. From the Census Estimates for 2019, <1> Ontonagon had a population of 5,720 people. This is a decrease of 15.58% since the last Census (which gave a population of 6,776 people in 2010). At the time of the 2010 Census, Ontonagon represented 0.07% of the total population of Michigan. Websites of Interest ...
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