6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tecumseh | 1 | 1,646 | 1,705 | -0.72% | 1,089 | 1.51 | City |
| Sterling | 2 | 464 | 479 | -0.64% | 1,140 | 0.41 | Village |
| Cook | 3 | 305 | 320 | -0.97% | 1,763 | 0.17 | Village |
| Elk Creek township | 4 | 135 | 130 | 0.75% | 1 | 94.95 | Township |
| Elk Creek | 5 | 62 | 67 | -1.59% | 477 | 0.13 | Village |
| Crab Orchard | 6 | 44 | 46 | 0% | 277 | 0.16 | Village |
Tecumseh is the largest city in Johnson County, with a population of 1,646.
Crab Orchard is the smallest city in Johnson County.
There are 6 cities in Johnson County, Nebraska.