| Poplar Creek | |
| Mouth Location: | Clinch River |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Tennessee |
| Source1 Elevation: | 820feet |
| Basin Size: | 82sqmi |
Poplar Creek is a tributary of the Clinch River in Anderson and Roane counties in East Tennessee. Draining a watershed area of more than 82mi2,[1] it enters the Clinch near the former K-25 site, a short distance downstream from the confluence of East Fork Poplar Creek, its largest tributary.