5 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Oshkosh | 1 | 67,406 | 66,913 | 0.12% | 2,422 | 28 | City |
| Neenah | 2 | 27,556 | 27,393 | 0.1% | 2,850 | 10 | City |
| Menasha | 3 | 18,510 | 18,278 | 0.21% | 3,063 | 6 | City |
| Omro | 4 | 3,635 | 3,662 | -0.11% | 1,485 | 2 | City |
| Winneconne | 5 | 2,489 | 2,533 | -0.28% | 1,678 | 1 | Village |
Oshkosh is the largest city in Winnebago County, with a population of 67,406.
Winneconne is the smallest city in Winnebago County, with a population of 2,489.
There are 5 cities in Winnebago County, Wisconsin.