California is a state in the Western United States, lying on the American Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and the Mexican state of Baja California to the south. With 39 million residents across an area of 163,696 square miles (423,970 km²), it is the most populous U.S. state, the third-largest by area, and most populated subnational entity in North America. The Greater Los Angeles and San Francisco Bay areas are the nation's second- and fifth-most populous urban regions, with 19 million and 10 million residents respectively. Los Angeles is the state's most populous city and the nation's second-most, after New York. California's capital, Sacramento, is located in the Central Valley.