Admission of California as a State

Date: September 9, 1850 • Location: Parksdale, United States

California is admitted as the thirty-first U.S. state.

California is a state in the Western United States. It is bordered by Oregon to the north, the Mexican state of Baja California to the south, Nevada to the east, Arizona to the southeast, and the Pacific Ocean to the west. With a population of over 39 million across an area of 163,696 square miles (423,970 km2), it is the most populous U.S. state and the third largest by land area.