The ocean located east of the United States is the Atlantic Ocean. This vast body of water separates the United States from Europe and Africa. The Atlantic Ocean is the second-largest ocean in the world, covering about 20% of the Earth's surface, and it has significant historical importance, being a major route for exploration, trade, and migration. The ocean serves various ecological roles and is home to a diverse range of marine life, along with being critical for weather patterns and ocean currents that influence climate.