Which state borders the Pacific Ocean along its entire western border?

California borders the Pacific Ocean along its entire western border, making it the correct answer. Stretching from the Mexican border in the south to the Oregon border in the north, California has a lengthy coastline that directly faces the Pacific. This coastal geography significantly influences California's climate, economy, and culture, contributing to its status as a hub for industry, tourism, and agriculture.

While Oregon and Washington also have coastlines along the Pacific Ocean, they do not stretch along the entire western border of the state. Similarly, Alaska has an extensive coastline with the Pacific Ocean, but it has many coastal regions that face other bodies of water as well. Therefore, California is unique in that it has no land borders along its western edge that would separate it from the Pacific, making it the only state to fit this description completely.