8 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Auburn | 1 | 3,527 | 3,477 | 0.28% | 1,618 | 2.18 | City |
| Nemaha township | 2 | 728 | 724 | 0.41% | 20 | 35.76 | Township |
| Peru | 3 | 561 | 653 | -3.11% | 1,067 | 0.53 | City |
| Johnson | 4 | 312 | 311 | 0% | 1,418 | 0.22 | Village |
| Brownville | 5 | 143 | 140 | 0.7% | 219 | 0.65 | Village |
| Brock | 6 | 123 | 122 | 0% | 393 | 0.31 | Village |
| Nemaha | 7 | 115 | 114 | 0% | 380 | 0.30 | Village |
| Julian | 8 | 46 | 46 | 0% | 442 | 0.10 | Village |
Auburn is the largest city in Nemaha County, with a population of 3,527.
Julian is the smallest city in Nemaha County.
There are 8 cities in Nemaha County, Nebraska.