| Poplar Rapids River | |
| Pushpin Map: | Canada Ontario |
| Pushpin Map Caption: | Location of the mouth of the river in Ontario |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Ontario |
| Subdivision Type3: | Region |
| Subdivision Name3: | Northeastern Ontario |
| Subdivision Type4: | District |
| Subdivision Name4: | Cochrane |
| Subdivision Type5: | Part or municipality |
| Subdivision Name5: | Unorganized North Cochrane District, Fauquier-Strickland |
| Source1: | Unnamed woods |
| Source1 Location: | Ford Township |
| Source1 Elevation: | 292m (958feet)[1] |
| Mouth: | Mattagami River |
| Mouth Location: | Hurdman Township |
| Mouth Coordinates: | 49.5792°N -81.7972°W[2] |
| Mouth Elevation: | 209m (686feet) |
| River System: | James Bay drainage basin |
The Poplar Rapids River is a river in the municipality of Fauquier-Strickland and Unorganized North Cochrane District, Cochrane District in Northeastern Ontario, Canada.[3] [4] [5] [6] It is in the James Bay drainage basin and is a left tributary of the Mattagami River.
The river begins at an unnamed woods in geographic Ford Township in Unorganized North Cochrane District and flows north, passes into and out of the municipality of Fauquier-Strickland twice, taking in the left tributary Sydere Creek there, and reaches the south shore of Departure Lake, exiting the lake at the north and continuing north. It takes in the right tributary Haggart Creek, passes under Ontario Highway 11 and the Ontario Northland Railway at the community of Departure Lake, flows through Ouellet Lake, and reaches its mouth at the Mattagami River in geographic Hurdman Township. The Mattagami River flows via the Moose River to James Bay.