is a census-designated place (CDP) in Contra Costa County, California, United States. The population was 12,260 at the 2000 census. The Spanish name 'El Sobrante' translates to 'leftover', 'remainder', 'extra' or 'surplus' in English.
According to the United States Census Bureau, the CDP has a total area of 3.1 square miles (8.0 km²), all of it land.
El Sobrante lies within unincorporated Contra Costa County. Main roads include San Pablo Dam Road (a major road running from Richmond and San Pablo, through El Sobrante, past EBMUD's San Pablo Reservoir), Valley View Road and Appian Way. San Pablo Dam Road and Appian Way both connect to Interstate 80 to the west.