1.Californiaisdividedinto58counties.2.Notallcountynamesarethesameasthenamesoftheirprincipalcities.Forinstance,OrangeCountyhasIrvineasitsmaincity,yetthecountynamediffersfromthecity's.3.RiversideCountyencompassesseveralcitiesortowns,includingRiverside,PalmSprings,andMorenoValley,anditisnotpartofLosAngelesCountybutis,infact,partofthestateofCalifornia.4.LosAngelesCountydoesincludethecityofLosAngeles,whichservesasboththecounty'smaincityanditscountyseat.ThisinformationisbasedonCalifornia'scounty-leveladministrativedivisionsandcanbeverifiedonrelevantpagesonWikipedia.详情