In California there is one consolidated city and county government - San Francisco. The voters mutually agreed to merge two separate levels of government. Each county government has a principal governing board. The county board posses primarily administrative powers and their powers are limited to tax and appropriation of funds. Members are elected by the voters of the township.
Individual members are supervisors or administrators of their townships.
Small boards, made up of 3-7 members, called board of county commissioners. Members are elected at large. In Orange County, we are governed by 5 members of the Board of Supervisors. Our board members are elected from separate districts in the county. Board of Supervisors have both legislative and executive powers.