| Rapid River | |
| Pushpin Map: | Saskatchewan#Canada |
| Pushpin Map Size: | 250px |
| Pushpin Map Caption: | Location of the mouth of the Rapid River in Saskatchewan |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Saskatchewan |
| Source1: | Unnamed lake |
| Source1 Coordinates: | 57.85°N -105.2036°W |
| Mouth: | Cree River |
| Mouth Coordinates: | 58.3131°N -105.8025°W |
| Tributaries Left: | Arnold River |
The Rapid River is a river in northern Saskatchewan, Canada. It is part of the Mackenzie River drainage basin.
The Rapid River begins at an unnamed lake at an elevation of 572m (1,877feet). It travels north to Kirsch Lake at an elevation of 498m (1,634feet), where it takes in several unnamed tributaries, including one from the left arriving from Halliday Lake. The river continues to Parker Lake at an elevation of 413m (1,355feet) where it takes in the left tributary Arnold River. It then reaches its mouth at the Cree River at an elevation of 330m (1,080feet). The river's waters flow via the Cree River, the Fond du Lac River and the Mackenzie River to the Arctic Ocean.