Ontonagon County Flag

Ontonagon County

State:
Michigan
County Seat:
Ontonagon

Ontonagon County's estimated 2026 population is 5,780 with a growth rate of -0.74% in the past year according to the most recent United States census data. Ontonagon County is the 82nd largest county in Michigan. The 2010 population was 6,776 and has seen a growth of -14.7% since that time.

5,780
Total Population
4
Population Density (mi²)
82
Population Rank (State)
-43 -0.74%
Annual Population Growth

Ontonagon County Population

Demographics

Economics and Income Statistics