| Place Name | Karns |
| Place Type | Census Designated Place |
| ZIP Code(s) | 37931 |
| County | Knox County |
| Area Code(s) | 865 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 3,755 |
| Majority Ethnicity | White 97.14% |
| Metro/Micro Stats Area | Knoxville, TN |
| US Congressional District(s) | Tennessee 2nd |
| State House Districts | 89 |
| State Senate Districts | 7 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 97.14% |
| African American | 2.06% |
| Hispanic | 0.16% |
| Asian | 0.44% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.19% |