| Lower Tamarack River | |
| Pushpin Map: | Minnesota |
| Pushpin Map Caption: | Mouth of the Lower Tamarack River |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Subdivision Type2: | State |
| Subdivision Name2: | Minnesota |
| Subdivision Type3: | County |
| Subdivision Name3: | Pine |
| Progression: | Lower Tamarack→ St. Croix River→ Mississippi River→ Gulf of Mexico |
| River System: | St. Croix River |
The Lower Tamarack River is a 39adj=midNaNadj=mid[1] river in Pine County near the eastern border of Minnesota, in the United States. It is a tributary of the St. Croix River, which flows southwards to the Mississippi River.
The Upper Tamarack River is a separate stream also flowing into the St. Croix River several miles upstream from the mouth of the Lower Tamarack River.