Oakland /ˈoʊklənd/ is a major West Coast port city in the U.S. state of California. The Port of Oakland is the busiest port for San Francisco Bay and all of Northern California. Oakland is the third largest city in the San Francisco Bay Area, the eighth-largest city in California, and the 45th-largest city in the U.S. with a population of 406,253 as of 2013. Incorporated in 1852, Oakland is the county seat of Alameda County. It serves as a major transportation hub and trade center for the entire region and is also the principal city of the Bay Area Region known as the East Bay.