| Name | Franklin County |
| State | Idaho |
| FIPS Code | 16041 |
| County Seat | Preston |
| Timezone | Mountain Daylight Time (MDT) |
| Population (2024) | 15,516 |
| Population Growth Rate(2020-2024) | 8.52% |
| Majority Ethnicity | White 91.93% |
| Public School Majority Ethnicity | White 89% |
| Partisan Voting Index | Strongly Republican:+39 |
| Unemployment Rate (May 2026) | 3.5% |
| Sales Tax Rate (2025) | 6% |
| Area Code(s) | 208 / 986 |
| Race/Ethnicity | Percentage of Population (2023) |
|---|---|
| White | 91.93% |
| African American | 0% |
| Hispanic | 7.3% |
| Asian | 0.03% |
| Native American | 0.63% |
| Hawaiin/Pacific Islander | 0.12% |
| 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% |