Pacific Ocean, the world's largest body of water. It lies between North and South America on the east, Asia and Australia on the west, and Antarctica on the south. The Pacific, including adjoining seas, has an area of about 64,186,300 square miles (166,241,700 km 2). It makes up almost 33 per cent of the earth's total surface and 46 per cent of its water surface, and is larger than all land areas combined. The ocean is commonly divided at the Equator into the North and the South Pacific.

Maximum dimensions are almost 11,000 miles (17,700 km) east-west (along the Equator) and 9,500 miles (15,200 km) north-south (near the International Date Line). Average depth is about 14,000 feet (4,270 m). Bordering the Pacific are numerous seas. They lie mainly in the west and include the Tasman, Arafura, Coral, South China, Philippine, East China, Japan, Okhotsk, and Bering seas.