The Superior Court of Washington for King County (more commonly, the King County Superior Court) is the largest trial court in Washington state.

It is based at the King County Courthouse, 516 Third Avenue, in downtown Seattle, Washington.

It also operates a juvenile facility and a Regional Justice Center in Kent, southeast of Seattle.

As of November 2018, the court has 53 judges who have general jurisdiction to hear major civil and criminal cases.

This Washington-related article is a stub.