| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oshkosh | 1 | 67,507 | 66,935 | 0.07% | 2,426 | 28 | City |
| Neenah | 2 | 27,651 | 27,389 | 0.05% | 2,860 | 10 | City |
| Menasha | 3 | 18,416 | 18,278 | 0.17% | 3,047 | 6 | City |
| Omro | 4 | 3,633 | 3,663 | -0.16% | 1,484 | 2 | City |
| Winneconne | 5 | 2,489 | 2,531 | -0.36% | 1,678 | 1 | Village |
Oshkosh is the largest city in Winnebago County, with a population of 67,507.
Winneconne is the smallest city in Winnebago County, with a population of 2,489.
There are 5 cities in Winnebago County, Wisconsin.