Ontonagon is a city located in Michigan. With a 2020 population of 1,242, it is the 322nd largest city in Michigan and the 9437th largest city in the United States. Ontonagon is currently declining at a rate of -1.27% annually and its population has decreased by -16.87% since the most recent census, which recorded a population of 1,494 in 2010. Ontonagon reached it's highest population of 1,489 in 2010. Spanning over 4 miles, Ontonagon has a population density of 336 people per square mile.
The average household income in Ontonagon is $45,130 with a poverty rate of 19.81%. The median rental costs in recent years comes to $507 per month, and the median house value is $61,400. The median age in Ontonagon is 55.9 years, 56.5 years for males, and 55.6 years for females. For every 100 females there are 82.0 males.