8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Auburn | 1 | 3,468 | 3,483 | -0.06% | 1,591 | 2 | City |
| Nemaha | 2 | 727 | 728 | 0% | 20 | 36 | Township |
| Peru | 3 | 685 | 678 | 0.15% | 1,302 | 1 | City |
| Johnson | 4 | 302 | 308 | -0.33% | 1,373 | 0 | Village |
| Brownville | 5 | 139 | 141 | 0% | 213 | 1 | Village |
| Brock | 6 | 117 | 120 | 0% | 374 | 0 | Village |
| Nemaha | 7 | 109 | 111 | 0% | 360 | 0 | Village |
| Julian | 8 | 46 | 46 | 0% | 442 | 0 | Village |
Auburn is the largest city in Nemaha County, with a population of 3,468.
Julian is the smallest city in Nemaha County, with a population of 46.
There are 8 cities in Nemaha County, Nebraska.