California is the most populous state in the United States, and the third largest by area. California is the second most populous sub-national entity in the Americas, behind only São Paulo, Brazil. It is located on the West Coast of the United States, and is bordered by Oregon to the north, Nevada to the northeast, Arizona to the southeast, the Mexican state of Baja California to the south, and the Pacific Ocean to the west. Its four largest cities are Los Angeles, San Diego, San Jose, and San Francisco.[5] The state is home to the nation's second and sixth largest metropolitan areas as well as eight of the nation's fifty largest cities. California has varied climate and geography and a diverse population.