Canada has the highest coastline. Following are the top five
1. Canada coastline is 202,080 km
2. Indonesia coastline is 54,716 km
3. Greenland coastline is 44,087 km
4. Russia coastline is 37,653 km
5. Philippines coastline is 36,289 km
Canada. It has 125,566 miles of coastline (202,079km) then next is Indonesia with 33,999 miles (53,717km)
This is primarily due to its arctic islands and also the ruggedness of the interior coasts.
Canada has the longest coastline.