7 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marinette | 1 | 11,151 | 11,115 | 0.05% | 1,591 | 7 | City |
| Peshtigo | 2 | 3,405 | 3,416 | -0.06% | 1,169 | 3 | City |
| Niagara | 3 | 1,566 | 1,604 | -0.38% | 567 | 3 | City |
| Crivitz | 4 | 1,130 | 1,093 | 0.53% | 713 | 2 | Village |
| Coleman | 5 | 732 | 729 | 0.14% | 542 | 1 | Village |
| Wausaukee | 6 | 591 | 596 | -0.17% | 430 | 1 | Village |
| Pound | 7 | 345 | 353 | -0.29% | 389 | 1 | Village |
Marinette is the largest city in Marinette County, with a population of 11,151.
Pound is the smallest city in Marinette County, with a population of 345.
There are 7 cities in Marinette County, Wisconsin.