The King County Courthouse is the seat of government of King County, Washington. It is located in downtown Seattle, Washington, just north of Pioneer Square. The 1916 structure houses courtrooms for King County Superior Court and Seattle District Court; the offices of the King County Executive, Prosecutor, and Sheriff; the chambers of the King County Council, and other court and county functions. It is located just north of City Hall Park at 516 Third Avenue, between Dilling Way and James Street.