| Place Name | Lake Tansi |
| Place Type | Census Designated Place |
| ZIP Code(s) | 38572 |
| County | Cumberland County |
| Area Code(s) | 931 |
| Timezone | Central Standard Time (CST) |
| Population (2022) | 3,525 |
| Population Growth Rate (2010-19) | 21.72% |
| Majority Ethnicity | White 96.88% |
| Metro/Micro Stats Area | Crossville, TN |
| US Congressional District(s) | Tennessee 6th |
| State House Districts | 25 |
| State Senate Districts | 15 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.88% |
| African American | 0% |
| Hispanic | 2.21% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 0.91% |