Founded in 1857, Johnson County is one of 93 counties in the state of Nebraska. Historically, Johnson County was formed from Nemaha and Otoe Counties. The city of Tecumseh is the county seat. With FIPS code of 97, Johnson County has a population of 5,316 and area of 376 square miles (974 km2).
List of all cities in Johnson County, NE alphabetically
| City/Town | Postal Code | Area Code |
| Cook, NE | 68329 | 402 |
| Crab Orchard, NE | 68332 | 402 |
| Elk Creek, NE | 68348 | 402 |
| Graf, NE | 68450 | 402 |
| Saint Mary, NE | 68443 | 402 |
| Sterling, NE | 68443 | 402 |
| Tecumseh, NE | 68450 | 402 |