Mexico covers 761,610 sq mi and is the world’s 13th largest country by area; with a population of almost 130 million, it is the 10th most populous country and has the most Spanish speakers in the world. Mexico is a federal constitutional republic comprising 31 states and Mexico City, its capital and largest city, which is among the world’s most populous metropolitan areas. The country has maritime borders with the Pacific Ocean to the west, the Caribbean Sea to the southeast, and the Gulf of Mexico to the east.