Founded in 1877, Sioux County is one of 93 counties in the state of Nebraska. Historically, Sioux County was formed from unorganized territory. The city of Harrison is the county seat. With FIPS code of 165, Sioux County has a population of 1,143 and area of 1,313 square miles (3,401 km2).
List of all cities in Sioux County, NE alphabetically
| City/Town | Postal Code | Area Code |
| Harrison, NE | 69346 | 308 |