Ontonagon information on the site is deemed reliable, but not guaranteed. Our Ontonagon stats, Ontonagon census, and Ontonagon information is aggregated from many different sources and may be dated. Currently, we have one Ontonagon foreclosures of five thousand four hundred four Ontonagon, Michigan housing units housing units, of which three thousand four hundred fifty-six are occupied, two thousand nine hundred thirty-eight are owner occupied, five hundred eighteen are rented, one thousand nine hundred forty-eight are vacant, and seven hundred fourteen have mortgages. has three thousand four hundred fifty-six households, and seven thousand eight hundred eighteen citizens.