| Rapid River | |
| Map: | Churchill river hudson basin map.png |
| Map Size: | 250px |
| 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: | Iskwatikan Lake |
| Source1 Coordinates: | 55.3928°N -104.3661°W |
| Mouth: | Nistowiak Lake |
| Mouth Coordinates: | 55.4003°N -104.3664°W |
Rapid River[1] is a short river in central Saskatchewan, Canada, about 13km (08miles) east of the community of Stanley Mission. It is part of the Churchill River drainage basin. The river is about 1000m (3,000feet) long and flows north from Iskwatikan Lake, which lies downstream from Lac la Ronge, over the Nistowiak Falls, one of the tallest in Saskatchewan, and the Fisher Rapids, to Nistowiak Lake on the Churchill River, which flows to Hudson Bay. The entire river is within Lac La Ronge Provincial Park. At the mouth of the river, on Nistowiak Lake, is the Stanley 157A Indian reserve.
The fish species in Rapid River include walleye, sauger, yellow perch, northern pike, lake trout, lake whitefish, cisco, white sucker, shorthead redhorse, longnose sucker, lake sturgeon, and burbot.