The United States of America is the 4th largest country in the world. It is located in the central part of the North American Continent, bordered by Canada to the North and Mexico to the South. The country is situated between the Atlantic Ocean in the East and the Pacific Ocean in the West. The total area of the USA is approximately 9 million square kilometres. As of 2010, the population was 310,300,000, making it the world's third largest population. The current US population represents 4.5% of the global population, meaning about 1 in 20 people on Earth resides in the United States. The country is bordered by three oceans: the Arctic, the Atlantic, and the Pacific. It is also home to numerous lakes, including the Great Lakes, and major rivers such as the Mississippi, Missouri, and Columbia. Significant mountain ranges include the Rocky Mountains, the Appalachian Mountains, the Cordillera, and the Sierra Nevada, with Mount McKinley being the highest peak, located in Alaska. The climate is diverse, and the country possesses rich natural and mineral resources like oil, gas, iron ore, and coal.