13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| St. Ignace | 1 | 2,287 | 2,302 | -0.13% | 867 | 2.64 | City |
| Clark township | 2 | 1,875 | 1,912 | -1.06% | 24 | 78.99 | Township |
| Curtis township | 3 | 1,159 | 1,096 | 1.05% | 17 | 68.44 | Township |
| Garfield township | 4 | 1,129 | 1,161 | -1.22% | 8 | 134.52 | Township |
| Moran township | 5 | 1,008 | 1,027 | -1.08% | 8 | 127.57 | Township |
| St. Ignace township | 6 | 948 | 972 | -1.25% | 10 | 97.29 | Township |
| Mackinac Island | 7 | 598 | 582 | 0.5% | 137 | 4.35 | City |
| Brevort township | 8 | 491 | 499 | -1.01% | 5 | 92.48 | Township |
| Newton township | 9 | 420 | 435 | -1.41% | 3 | 148.59 | Township |
| Cedarville township | 10 | 229 | 236 | -0.87% | 3 | 79.01 | Township |
| Hendricks township | 11 | 115 | 117 | -0.86% | 1 | 78.96 | Township |
| Bois Blanc township | 12 | 99 | 101 | -1% | 3 | 35.12 | Township |
| Naubinway | 13 | 94 | 101 | 6.82% | 228 | 0.41 | CDP |
St. Ignace is the largest city in Mackinac County, with a population of 2,287.
Naubinway is the smallest city in Mackinac County.
There are 13 cities in Mackinac County, Michigan.