| Name | Franklin County |
| State | Idaho |
| FIPS Code | 16041 |
| County Seat | Preston |
| Timezone | Mountain Standard Time (MST) |
| Population (2022) | 12,739 |
| Population Growth Rate(2000-2022) | 11.01% |
| Majority Ethnicity | White 99.23% |
| Public School Majority Ethnicity | White 89% |
| Partisan Voting Index | Strongly Republican:+39 |
| Unemployment Rate (January 2025) | 2.9% |
| Area Code(s) | 208 / 986 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 99.23% |
| African American | 0% |
| Hispanic | 0.5% |
| Asian | 0.27% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 88.69% |
| African American | 0.3% |
| Hispanic | 8.8% |
| Asian | 0.21% |
| Native American | 0.84% |
| Hawaiin/Pacific Islander | 0.21% |