The ocean on the West Coast of the United States is the Pacific Ocean). The Pacific Ocean is the largest ocean in the world, and it reaches from the West Coast of the United States to Asia and Australia. The West Coast of the United States, also known as the Pacific Coast, is the coastline along which the Western United States meets the North Pacific Ocean. The term typically refers to the contiguous U.S. states of California, Oregon, and Washington, but sometimes includes Alaska and Hawaii. For census purposes, Hawaii is part of the West Coast, along with the other four states.