Winisk River

{{For|the town situated along the river|Winisk, Ontario}}

{{Infobox river

| name = Winisk River

| name_native =

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| pushpin_map = Canada Ontario

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| subdivision_type1 = Country

| subdivision_name1 = Canada

| subdivision_type2 = Province

| subdivision_name2 = Ontario

| subdivision_type3 = District

| subdivision_name3 = Kenora

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| length = {{convert|475|km|mi|abbr=on}}

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| source1_elevation = {{convert|242|m|abbr=on}}

| mouth = Hudson Bay

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| mouth_coordinates = {{coord|55|16|30|N|85|5|30|W|display=inline,title}}

| mouth_elevation = {{convert|0|m|abbr=on}}

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| basin_size = {{convert|67300|km2|abbr=on}}

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The Winisk River is a river in northern Ontario, Canada, that starts at Wunnummin Lake and flows east to Winisk Lake. From there it continues in a mostly northerly direction to Hudson Bay. The Winisk River is {{convert|475|km|mi}} long and has a drainage basin of {{convert|67300|km2|sqmi}}.{{cite web |title= Canada Drainage Basins |year= 1985 |work= The National Atlas of Canada, 5th edition |publisher= Natural Resources Canada |url= http://atlas.nrcan.gc.ca/site/english/maps/archives/5thedition/environment/water/mcr4055 |access-date= 24 November 2010 |url-status=dead |archive-url=https://web.archive.org/web/20100328031840/http://atlas.nrcan.gc.ca/site/english/maps/archives/5thedition/environment/water/mcr4055 |archive-date=28 March 2010}} The name is from Cree origin meaning "groundhog".

The river is remote and not accessible by road. Only a few isolated communities are along the river: Wunnumin Lake First Nation (on same lake), Webequie (on Winisk Lake) and Peawanuck, about {{convert|30|km|mi}} from its end. It is characterized by strong currents and whitewater while flowing off the Canadian Shield into the Hudson Bay lowlands. Here the river becomes broad.