Founded in 1913, Franklin County is one of 44 counties in the state of Idaho. Historically, Franklin County was Oneida County. The city of Preston is the county seat. With FIPS code of 41, Franklin County has a population of 14,666 and area of 666 square miles (1,725 km2).
List of all cities in Franklin County, ID alphabetically
| City/Town | Postal Code | Area Code |
| Clifton, ID | 83228 | 208 |
| Dayton, ID | 83232 | 208 |
| Franklin, ID | 83237 | 208 |
| Grace, ID | 83283 | 208 |
| Linrose, ID | 83286 | 208 |
| Preston, ID | 83263 | 208 |
| Thatcher, ID | 83283 | 208 |
| Weston, ID | 83286 | 208 |