| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Marinette | 1 | 11,181 | 11,116 | 0.12% | 1,595 | 7 | City |
| Peshtigo | 2 | 3,422 | 3,421 | -0.03% | 1,175 | 3 | City |
| Niagara | 3 | 1,571 | 1,600 | -0.38% | 569 | 3 | City |
| Crivitz | 4 | 1,143 | 1,092 | 0.53% | 721 | 2 | Village |
| Coleman | 5 | 739 | 729 | 0.14% | 547 | 1 | Village |
| Wausaukee | 6 | 593 | 596 | -0.17% | 431 | 1 | Village |
| Pound | 7 | 350 | 355 | -0.28% | 395 | 1 | Village |
Marinette is the largest city in Marinette County, with a population of 11,181.
Pound is the smallest city in Marinette County, with a population of 350.
There are 7 cities in Marinette County, Wisconsin.