| Name | Johnson County |
| State | Tennessee |
| FIPS Code | 47091 |
| County Seat | Mountain City |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 18,199 |
| Population Growth Rate(2000-2022) | -1.62% |
| Majority Ethnicity | White 95.43% |
| Public School Majority Ethnicity | White 94% |
| Partisan Voting Index | Strongly Republican:+33 |
| Unemployment Rate (December 2024) | 3.9% |
| Area Code(s) | 423 |
| Race/Ethnicity | Percentage of Population (2022) |
|---|---|
| White | 95.43% |
| African American | 3.81% |
| Hispanic | 0.59% |
| Asian | 0.17% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0% |
| Race/Ethnicity | Percentage of Public School Students (2023) |
|---|---|
| White | 93.55% |
| African American | 0.09% |
| Hispanic | 5.13% |
| Asian | 0.19% |
| Native American | 0.14% |
| Hawaiin/Pacific Islander | 0.05% |