The largest ocean in the world is the Pacific Ocean. It covers approximately 168.7 million square kilometers (about 63.8 million square miles), making up roughly 46.6% of the global ocean area. The Pacific Ocean is also the deepest ocean, with an average depth of about 3,970 meters and containing the Mariana Trench, the deepest point on Earth. It spans from the Arctic in the north to the Antarctic in the south and borders several continents and countries including Asia, the Americas, and Australia.