| Name | Madison County |
| State | Idaho |
| FIPS Code | 16065 |
| Timezone | Mountain Standard Time (MST) |
| Population (2019) | 39,907 |
| Population Growth Rate(2000-2019) | 5.94% |
| Majority Ethnicity | White 91.07% |
| Public School Majority Ethnicity | White 90% |
| Partisan Voting Index | Strongly Republican:+25 |
| Race/Ethnicy | Percentage of Population (2018) |
|---|---|
| White | 91.07% |
| African American | 0.27% |
| Hispanic | 7.29% |
| Asian | 1.12% |
| Native American | 0.12% |
| Hawaiin/Pacific Islander | 0.13% |
| Race/Ethnicy | Percentage of Public School Students (2018) |
|---|---|
| White | 90.49% |
| African American | 0.82% |
| Hispanic | 6.75% |
| Asian | 0.95% |
| Native American | 0.39% |
| Hawaiin/Pacific Islander | 0.42% |