Which ocean borders the West Coast of the United States?

The correct answer is the Pacific Ocean because it is the ocean that lies to the west of the continental United States. The Pacific Ocean is the largest and deepest ocean on Earth, and it stretches from the Arctic Ocean in the north to the Southern Ocean in the south, directly adjacent to the western shores of the U.S. states including California, Oregon, and Washington. Understanding this geographical fact is essential for grasping the physical layout of the United States and how it interacts with global maritime routes and ecosystems. The other oceans listed — the Atlantic, Indian, and Arctic — are located in different positions relative to the U.S. and do not border its West Coast.