What ocean lies on the west coast of the United States?

The Pacific Ocean lies on the west coast of the United States and is the largest and deepest of the Earth's oceanic divisions, covering more than 63 million square miles. It stretches from the Arctic Ocean in the north to the Southern Ocean in the south, bordering numerous countries, including the United States.

Understanding the geography of oceans is fundamental for many aspects of U.S. history and culture, as the Pacific Ocean has played a significant role in trade, exploration, and military strategy. The Pacific Coast of the U.S. is known for its diverse ecosystems, significant cities like Seattle and San Francisco, and its importance in trans-Pacific trade.

In contrast, the Indian, Atlantic, and Arctic Oceans do not border the western coastline of the United States. The Atlantic Ocean is located to the east, the Indian Ocean is situated to the south of Asia, and the Arctic Ocean is found to the north, making them irrelevant to the geography pertaining specifically to the west coast of the U.S.