8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oshkosh | 1 | 65,790 | 66,774 | -0.3% | 2,430 | 27 | City |
| Neenah | 2 | 27,506 | 27,373 | 0.1% | 2,892 | 10 | City |
| Menasha | 3 | 17,943 | 18,257 | -0.35% | 2,969 | 6 | City |
| Omro | 4 | 3,601 | 3,655 | -0.3% | 1,471 | 2 | City |
| Winneconne | 5 | 2,476 | 2,540 | -0.52% | 1,670 | 1 | Village |
| Winchester | 6 | 622 | 572 | -0.64% | 269 | 2 | CDP |
| Waukau | 7 | 386 | 235 | 2.12% | 278 | 1 | CDP |
| Eureka | 8 | 295 | 410 | 1.72% | 279 | 1 | CDP |
Oshkosh is the largest city in Winnebago County, with a population of 65,790.
Eureka is the smallest city in Winnebago County, with a population of 295.
There are 8 cities in Winnebago County, Wisconsin.