EntityQ2622618· pop 28· linked from 143 articlesDiabloSign in to saveCDP in Contra Costa County, California, United StatesConnectionscensus-designated place in the United StatesEntitySan Mateo CountyEntityUnited States Census BureauEntityunincorporated areaEntity2000 United States CensusEntityBlackhawkEntityMount DiabloEntityUnited StatesCountrySpanishEntityCaliforniaEntitySan FranciscoEntitytime zoneEntitygeographic coordinate systemEntityInternational Standard Book NumberEntitySan JoseEntityDemocratic Party (United States)ConceptU.S. stateEntityOaklandEntityDaylight saving timeConceptAfrican AmericansEntityCategoriesCensus-designated places in CaliforniaCensus-designated places in Contra Costa County, CaliforniaMount Diablo