8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Alpena | 1 | 10,092 | 10,211 | -0.24% | 1,235 | 8 | City |
| Alpena | 2 | 9,127 | 9,086 | 0.21% | 87 | 105 | Township |
| Sanborn | 3 | 2,103 | 2,081 | 0.38% | 48 | 44 | Township |
| Ossineke | 4 | 1,666 | 1,631 | 0.85% | 16 | 106 | Township |
| Maple Ridge | 5 | 1,583 | 1,557 | 0.44% | 31 | 52 | Township |
| Green | 6 | 1,142 | 1,116 | 0.53% | 16 | 71 | Township |
| Long Rapids | 7 | 988 | 977 | -0.1% | 18 | 54 | Township |
| Wellington | 8 | 253 | 248 | 0% | 5 | 53 | Township |
Alpena is the largest city in Alpena County, with a population of 10,092.
Wellington is the smallest city in Alpena County, with a population of 253.
There are 8 cities in Alpena County, Michigan.