Berkeley is a city on the east shore of the San Francisco Bay in Northern California, United States. Its neighbors to the south are the cities of Oakland and Emeryville. To the north is the city of Albany and the unincorporated community of Kensington. The eastern city limits coincide with the county line (bordering Contra Costa County), which generally follows the ridge line of the Berkeley Hills. Berkeley is located in northern Alameda County. Berkeley is the site of the University of California, Berkeley, the oldest of the University of California system, and the Lawrence Berkeley National Laboratory. It is also home to the Graduate Theological Union. The city is noted as one of the most politically liberal in the nation, with one study placing it as the third most liberal city in the United States.