Canada has the world's longest coastline, stretching more than 200,000 kilometres.
Canada borders the Atlantic, Pacific and Arctic oceans. Its coastline is exceptionally long because it includes the mainland, the Arctic Archipelago and thousands of islands. The exact total varies by measurement method and map scale, but commonly cited figures exceed 200,000 kilometres.
The Arctic Archipelago includes large islands such as Baffin Island, Victoria Island and Ellesmere Island. Hudson Bay, although often treated as an inland sea, is connected to the Atlantic through Hudson Strait and contributes to Canada's complex coastal geography.
Russia has the second-longest national coastline in many comparisons, while Indonesia and Greenland also have extensive coasts. Coastline rankings are not perfectly fixed because small bays and inlets produce different results under different measuring scales.