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Spanish for "surplus" or "remaining land," El Sobrante is a census-designated place (CDP) in Contra Costa County, California, United States. Famous for being the hometown of many popular musicians, the town was made famous Les Claypool of Primus in the song, “El Sobrante Fortnight.” The 2010 United States Census reported that El Sobrante had a population of 12,669. No need to keep sober in El Sobrante, just look up your local cannabis dispensary.