EntityQ3303221· pop 28· linked from 138 articlesRollingwoodSign in to savecensus-designated place in Contra Costa County, CaliforniaConnectionscensus-designated place in the United StatesEntitySan Mateo CountyEntityUnited States Census BureauEntityunincorporated areaEntity2000 United States CensusEntityBlackhawkEntityUnited StatesCountryCaliforniaEntitySan FranciscoEntitytime zoneEntitygeographic coordinate systemEntityInternational Standard Book NumberEntitySan JoseEntityDemocratic Party (United States)ConceptU.S. stateEntityOaklandEntityDaylight saving timeConceptAfrican AmericansEntitypostal codeEntityBerkeleyEntityCategoriesCensus-designated places in CaliforniaCensus-designated places in Contra Costa County, California