Atlantic Ocean Language Download PDF Watch Edit "Atlantic", "North Atlantic", "South Atlantic", and "Atlantic Basin" redirect here. For other uses, see Atlantic (disambiguation) , North Atlantic (disambiguation) , South Atlantic (disambiguation) , and Atlantic Basin (disambiguation) . The Atlantic Ocean is the second largest of the world's oceans , with an area of about 106,460,000 square kilometers (41,100,000 square miles). [2] [3] It covers approximately 20 percent of Earth's surface and about 29 percent of its water surface area. It separates the " Old World " from the " New World ". Atlantic Ocean Extent of the Atlantic Ocean according to the 2002 IHO definition, excluding Arctic and Antarctic regions Coordinates 0°N 25°W [1] Basin countries List of countries , ports Surface area 106,460,000 km 2 (41,100,000 sq mi) [2] [3] ...