The Cedar River is a river in the Hudson Bay drainage basin in the Unorganized Part of Kenora District in northwestern Ontario in Canada.

[2] The river begins at the outflow from Cedar Lake and flows north to through Church Lake to Perrault Lake where it takes in the right tributary Ord River.

It flows out at the north end of the lake under Ontario Highway 105 and over the Perrault Falls at the unincorporated place of Perrault Falls, passes through Wabaskang Lake, takes in the left tributary Anishinabi River and reaches its mouth at the English River, just south of where Ontario Highway 804 crosses that river and about 6 kilometres (4 mi) upstream of the Ontario Power Generation Manitou Falls Generating Station.

The Cedar River flows via the Winnipeg River and the Nelson River to Hudson Bay.

This article related to a river in Northern Ontario, Canada is a stub.