La Paz, officially Nuestra Señora de La Paz, is the seat of government of the Plurinational State of Bolivia. With 755,732 residents as of 2024, La Paz is the third-most populous city in Bolivia. Its metropolitan area, which is formed by La Paz, El Alto, Achocalla, Viacha, and Mecapaca makes up the second most populous urban area in Bolivia, with a population of 2.2 million, after Santa Cruz de la Sierra with a population of 2.3 million. It is also the capital of the La Paz Department.