4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Stromsburg | 1 | 1,166 | 1,145 | 0.34% | 1,152 | 1 | City |
| Osceola | 2 | 892 | 870 | 0.45% | 967 | 1 | City |
| Shelby | 3 | 755 | 721 | 0.8% | 1,401 | 1 | Village |
| Polk | 4 | 344 | 347 | 0% | 703 | 0 | Village |
Stromsburg is the largest city in Polk County, with a population of 1,166.
Polk is the smallest city in Polk County, with a population of 344.
There are 4 cities in Polk County, Nebraska.