East Bay

37°42′N 122°00′W / 37.7°N 122°W / 37.7; -122

East Bay
Region
The East Bay in 2015, with the Bay Bridge connecting from Oakland to Treasure Island and San Francisco Oakland and the Bay Bridge Oakland Mount Diablo
Map of incorporated and unincorporated areas in East Bay, California
Country	United States
State	California
Part of	San Francisco Bay Area
Principal city	Oakland
Other municipalities	List Fremont Hayward Concord Berkeley Antioch Richmond
Area codes	510/341, 925

The East Bay is the eastern region of the San Francisco Bay Area and includes cities along the eastern shores of the San Francisco Bay and San Pablo Bay. The region has grown to include inland communities in Alameda and Contra Costa counties.^[1] With a population of roughly 2.8 million in 2024, it is the most populous subregion in the Bay Area, containing the second- and third-most populous Bay Area counties of Alameda (1.7 million) and Contra Costa (1.1 million).^[2]

Oakland is the largest city in the East Bay by population and the third largest in the Bay Area. The city serves as a major transportation hub for the U.S. West Coast, and its port is the largest in Northern California. Increased population has led to the growth of large edge cities such as Alameda, Concord, Emeryville, Fremont, Hayward, Livermore, Pleasanton, San Ramon, and Walnut Creek.