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. The population was 112,580 at the 2010 census.