| Birch River | |
| Mouth Location: | St. Froid Lake (Fish River) |
| Subdivision Type1: | Country |
| Subdivision Name1: | United States |
| Length: | about 5miles |
The Birch River is a 5.1adj=midNaNadj=mid[1] river in Aroostook County, Maine, in the United States. From the confluence of its North Branch and South Branch (47.0326°N -68.679°W) in the southwest corner of the town of Eagle Lake, the river runs southeast to St. Froid Lake in Winterville Plantation. The lake is drained by the Fish River, a tributary of the Saint John River.