11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Big Creek | 1 | 2,728 | 2,602 | 0.26% | 19 | 142 | Township |
| Big Creek | 2 | 2,728 | 2,606 | 0.26% | 19 | 142 | Township |
| Comins | 3 | 1,926 | 1,846 | 0.21% | 27 | 71 | Township |
| Comins | 4 | 1,926 | 1,850 | 0.21% | 27 | 71 | Township |
| Mio | 5 | 1,241 | 1,555 | -3.05% | 148 | 8 | CDP |
| Greenwood | 6 | 1,223 | 1,159 | 0.33% | 17 | 70 | Township |
| Greenwood | 7 | 1,223 | 1,161 | 0.33% | 17 | 70 | Township |
| Elmer | 8 | 1,208 | 1,146 | 0.33% | 17 | 71 | Township |
| Elmer | 9 | 1,208 | 1,149 | 0.33% | 17 | 71 | Township |
| Mentor | 10 | 1,088 | 1,040 | 0.28% | 8 | 142 | Township |
| Mentor | 11 | 1,088 | 1,042 | 0.28% | 8 | 142 | Township |
Big Creek is the largest city in Oscoda County, with a population of 2,728.
Mentor is the smallest city in Oscoda County, with a population of 1,088.
There are 11 cities in Oscoda County, Michigan.