The country with the largest coastline is?

The country with the largest coastline is Canada. With over 243,000 kilometers of coastline, Canada has the longest coastline of any country in the world. This is due to the country's extensive geography, which includes a vast coastline along the Atlantic, Pacific, and Arctic oceans. Canada also has the largest number of islands of any country, with over 52,000 islands, including the large Arctic Archipelago and the Gulf Islands off the west coast of British Columbia.