| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Alpena | 1 | 10,063 | 10,227 | -0.25% | 1,231 | 8 | City |
| Alpena | 2 | 9,059 | 9,068 | -0.1% | 86 | 105 | Township |
| Sanborn | 3 | 2,105 | 2,082 | 0.29% | 48 | 44 | Township |
| Ossineke | 4 | 1,654 | 1,633 | 0.24% | 16 | 106 | Township |
| Maple Ridge | 5 | 1,591 | 1,563 | 0.13% | 31 | 52 | Township |
| Green | 6 | 1,136 | 1,110 | 0.35% | 16 | 71 | Township |
| Long Rapids | 7 | 985 | 979 | -0.2% | 18 | 54 | Township |
| Wellington | 8 | 255 | 247 | 0.79% | 5.0 | 53 | Township |
Alpena is the largest city in Alpena County, with a population of 10,063.
Wellington is the smallest city in Alpena County, with a population of 255.
There are 8 cities in Alpena County, Michigan.