Berkeley is a city on the east shore of San Francisco Bay in northern Alameda County, California, United States. It is named after the Irish eighteenth-century bishop and philosopher George Berkeley. It borders the cities of Oakland and Emeryville to the south and the city of Albany and unincorporated community of Kensington to the north. Its eastern border with Contra Costa County generally follows the ridge of the Berkeley Hills. Its population at the 2010 census was 111,580. Berkeley is the site of the oldest campus in the University of California system – the University of California. The city has many parks, and promotes greenery and the environment. The city has planted trees for years and is a leader in the nationwide effort to re-tree urban areas. The city is also heavily involved in creek restoration and wetlands restoration.