San Francisco County it is the second most populous county in California. The county seat is San Francisco, the fourth-most populous city in California and the 13th-most populous city in the United States. The county is home to more than one-quarter of the state's population and is the second-most densely populated county in the United States.

The county government is composed of the Board of Supervisors, the Mayor, and other elected officers and departments. The Board of Supervisors is the governing body of the county, responsible for setting policy and enacting laws. The Mayor is the chief executive officer of the county, responsible for overseeing the day-to-day operations of the county government. Other elected officers include the District Attorney, Sheriff, Assessor-Recorder, Treasurer-Tax Collector, and Clerk of the Board of Supervisors.

The county is served by a number of departments, including the Department of Public Health, Department of Public Works, Department of Emergency Management, Department of the Environment, Department of Technology, Department of Aging and Adult Services, Department of Children, Youth and Their Families, and the Department of Homelessness and Supportive Housing.

For the most up-to-date and in-depth information, please check the public records links below.