Founded in 1879, Cassia County is one of 44 counties in the state of Idaho. Historically, Cassia County was formed from Owyhee County. The city of Burley is the county seat. With FIPS code of 31, Cassia County has a population of 25,164 and area of 2,567 square miles (6,648 km2).
List of all cities in Cassia County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Albion, ID | 83311 | 208 |
| Almo, ID | 83312 | 208 |
| Basin, ID | 83346 | 208 |
| Burley, ID | 83318 | 208 |
| Churchill, ID | 83346 | 208 |
| Cotterel, ID | 83323 | 208 |
| Declo, ID | 83323 | 208 |
| Elba, ID | 83342 | 208 |
| Idahome, ID | 83323 | 208 |
| Malta, ID | 83342 | 208 |
| Oakley, ID | 83346 | 208 |
| Pella, ID | 83318 | 208 |
| Springdale, ID | 83318 | 208 |
| Starrhs Ferry, ID | 83318 | 208 |
| View, ID | 83318 | 208 |