| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Tecumseh | 1 | 1,687 | 1,722 | -0.47% | 1,116 | 2 | City |
| Sterling | 2 | 480 | 482 | -0.21% | 1,179 | 0 | Village |
| Cook | 3 | 312 | 320 | -0.64% | 1,803 | 0 | Village |
| Elk Creek | 4 | 66 | 68 | -1.49% | 508 | 0 | Village |
| Crab Orchard | 5 | 44 | 46 | -2.22% | 277 | 0 | Village |
Tecumseh is the largest city in Johnson County, with a population of 1,687.
Crab Orchard is the smallest city in Johnson County, with a population of 44.
There are 5 cities in Johnson County, Nebraska.