The ocean that borders the eastern coast of the United States is the Atlantic Ocean. This vast ocean extends from the Arctic Ocean in the north to the Southern Ocean in the south, separating North America from Europe and Africa. The Atlantic Ocean plays a crucial role in commerce, climate, and marine biodiversity. Major U.S. cities such as New York City, Miami, and Boston line its coast. The Atlantic is known for its strong currents, diverse ecosystems, and historical significance, as it has been a vital route for exploration, trade, and cultural exchange throughout history.