Nope, it’s not California. Alaska has the longest coastline in the USA. The Alaskan coastline stretches 6,640 miles (10,690 km), a distance greater than all the other states’ coastlines combined. And if you add in the Alaskan islands, it boasts 33,904 miles (54,563 km) of shoreline!
Now how about that for a nice stroll along the coast?