10 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Alpena | 1 | 10,085 | 10,197 | -0.22% | 1,234 | 8.17 | City |
| Alpena township | 2 | 9,170 | 9,104 | 0.27% | 87 | 104.83 | Township |
| Sanborn township | 3 | 2,099 | 2,078 | 0.43% | 48 | 43.78 | Township |
| Ossineke township | 4 | 1,653 | 1,631 | 0.43% | 16 | 105.74 | Township |
| Maple Ridge township | 5 | 1,600 | 1,556 | 0.88% | 31 | 51.62 | Township |
| Green township | 6 | 1,142 | 1,121 | 0.26% | 16 | 71.07 | Township |
| Long Rapids township | 7 | 1,003 | 980 | 0.6% | 19 | 54.20 | Township |
| Hubbard Lake | 8 | 882 | 886 | -0.9% | 101 | 8.74 | CDP |
| Ossineke | 9 | 831 | 828 | -0.84% | 227 | 3.66 | CDP |
| Wellington township | 10 | 259 | 248 | 1.17% | 5 | 53.22 | Township |
Alpena is the largest city in Alpena County, with a population of 10,085.
Wellington township is the smallest city in Alpena County.
There are 10 cities in Alpena County, Michigan.