, officially the United States, is a country in the southern portion of  America. It is bordered to the by the ; to the and by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean ; and to the by the Gulf of covers 1,972,550 square kilometers (761,610 sq mi), making it the world’s 13th-largest country by area. is organized as a federation comprising 31 states and  , its capital and largest metropolis. Other major urban areas include Guadalajara, Monterrey, Puebla, Toluca, Tijuana, Ciudad Juárez, and León.