 Oakland is also part of Alameda County, for which the Government of Alameda County is defined and authorized under the California Constitution, California law, and the Charter of the County of Alameda.The County government provides countywide services such as elections and voter registration, law enforcement, jails, vital records, property records, tax collection, public health, and social services.The County government is primarily composed of the elected five-member Board of Supervisors, other elected offices including the Sheriff/Coroner, the District Attorney, Assessor, Auditor-Controller/County Clerk/Recorder, and Treasurer/Tax Collector, and numerous county departments and entities under the supervision of the County Administrator.