The largest ocean in the world is the Pacific Ocean. It covers an expansive area of approximately 63.8 million square miles (165.2 million square kilometers), making it the largest and deepest ocean on Earth. The Pacific Ocean extends from the Arctic Ocean in the north to the Southern Ocean in the south, bordered by the eastern coastlines of Asia and Australia on one side and the western coastlines of North and South America on the other side. Its vast expanse encompasses numerous seas, archipelagos, and island chains, including the Hawaiian Islands, Galapagos Islands, and Mariana Islands. The Pacific Ocean plays a significant role in global climate patterns and is home to a wide range of marine life.