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  1. Mackenzie 2635 miles (4241 km)
  2. Yukon River 1978 miles (3183 km)
  3. Nelson 1597 miles (2570 km)
  4. Columbia River 1398 miles (2250 km)
  5. Churchill 994 miles (1600 km)
  6. Fraser 850 miles (1368 km)
  7. Ottawa 790 miles (1271 km)
  8. Athabasca 765 miles (1231 km)
  9. North Saskatchewan 758 miles (1220 km)
  10. Saint Lawrence River 744 miles (1197 km)
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14y ago
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14y ago

it is the Albany river it is tied with the Severn river it is 982 km

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14y ago

The Mackenzie river.

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Q: What is the longest river in Ontario Canada?
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Related questions

What is the longest river in ontario?

what is the longest river in ontario


What lake serves as the outlet to Canada's longest river?

Lake Ontario


What is Canada's largest river?

The Mackenzie River out of the Northwest Territories. Mackenzie River is the longest river in Canada


What is Canada's longest northwest flowing river?

Canada's longest flowing river is Mackenzie River


What length is the Ottawa river?

It is a river in the Canadian provinces of Ontario and Quebec.


Is Saskatchewan the longest border that Canada and the us share?

No, Ontario has the longest border with Canada and the US.


What Trans - Canada highway connects Blind River Ontario with Cudbury Ontario?

Trans-Canada Highway connects Blind River, Ontario with Cudbury, Ontario.


What river borders New York and Canada?

The border between New York State, USA and Ontario, Canada is formed entirely by waterways. Lake Ontario is the longest stretch of the border. The rivers which form the rest of the border are the Niagara River, which flows from Lake Erie into Lake Ontario, and the Saint Lawrence River, which flows from Lake Ontario out to the Gulf of Saint Lawrence and the Atlantic Ocean.


What is the third longest river in Canada?

It is the St.Lawrence river in Canada.


Mackenzia is the longest river in north armeria is that true?

The Mackenzie River in Canada is the longest river in Canada, but is second longest in North America. The Mississippi is the longest in North America.


What is the longest waterway in Canada?

the longest waterway in Canada is the St. Lawrence river


What is Canada s longest river?

The Mackenzie River is the largest river system in Canada.