11 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oconto | 1 | 4,624 | 4,616 | 0.04% | 682 | 6.78 | City |
| Oconto Falls | 2 | 3,006 | 2,963 | 0.3% | 1,109 | 2.71 | City |
| Gillett | 3 | 1,269 | 1,286 | -0.24% | 940 | 1.35 | City |
| Lena | 4 | 528 | 532 | -0.19% | 497 | 1.06 | Village |
| Suring | 5 | 516 | 521 | -0.19% | 503 | 1.02 | Village |
| Sobieski | 6 | 280 | 423 | 0.36% | 222 | 1.26 | CDP |
| Abrams | 7 | 268 | 401 | -1.47% | 325 | 0.82 | CDP |
| Lakewood | 8 | 267 | 356 | -1.11% | 97 | 2.77 | CDP |
| Mountain | 9 | 237 | 237 | -3.27% | 35 | 6.72 | CDP |
| Pulcifer | 10 | 133 | 96 | 0% | 129 | 1.03 | CDP |
| Townsend | 11 | 74 | 110 | -5.13% | 151 | 0.49 | CDP |
Oconto is the largest city in Oconto County, with a population of 4,624.
Townsend is the smallest city in Oconto County.
There are 11 cities in Oconto County, Wisconsin.