Mexico officially the United Mexican States, is a country in the southern portion of North America. Covering 1,972,550 square kilometers (761,610 sq mi), it is the 13th-largest country in the world. With approximately 128,649,565 inhabitants, Mexico is the 10th-most populous country and the most populous Spanish-speaking nation worldwide. Mexico is a federation comprising 31 states, including Mexico City (CDMX), which is the capital city and its largest metropolis. Other major urban areas include Guadalajara, Monterrey, Puebla, Toluca, Tijuana, Ciudad Juárez, and León.