Founded in 1887, Thomas County is one of 93 counties in the state of Nebraska. Historically, Thomas County was formed from unorganized territory. The city of Thedford is the county seat. With FIPS code of 171, Thomas County has a population of 673 and area of 713 square miles (1,847 km2).
List of all cities in Thomas County, NE alphabetically
| City/Town | Postal Code | Area Code |
| Brownlee, NE | 69166 | 308 |
| Halsey, NE | 69142 | 308 |
| Seneca, NE | 69161 | 308 |
| Thedford, NE | 69166 | 308 |