The largest ocean in terms of surface area is the Pacific Ocean, covering an impressive area of about 63 million square miles (165 million square kilometers). Spanning from the Arctic Ocean in the north to the Southern Ocean in the south, it is not only the largest ocean but also the deepest, featuring the Mariana Trench, which reaches depths of over 36,000 feet (about 11,000 meters). The Pacific Ocean plays a crucial role in global weather patterns, marine biodiversity, and international trade routes, making it a vital component of the Earth’s ecosystem.