Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905. It is located in the East Bay, part of the San Francisco Bay Area. It is the site of heavy industry, which has been undergoing a shift towards a service and commercial economy since the 1970s. Richmond almost completely surrounds the city of San Pablo and the unincorporated areas of North Richmond, El Sobrante and East Richmond Heights.