Superior Court of California, Contra Costa County State: CaliforniaCounty: Contra Costa Biz Office Phone: (925) 608-1000FCS Phone: (925) 608-1000Website: https://www.cc-courts.org/Local Forms: https://www.cc-courts.org/family/forms.aspxLocal Rules: https://www.cc-courts.org/general-information/local-rules.aspxCourt Holidays: https://www.cc-courts.org/general-information/court-holidays.aspxe-Filing: https://www.cc-courts.org/civil/efiling.aspx