Washington Probate Records
In the territorial era, probate courts were established in each county to keep records of wills, bonds, orders, and the administrations of estates. When the superior courts succeeded the probate courts in 1891, all of the records of the clerks of the probate courts were transferred to the county clerk in each courthouse. Some probates were filed in the superior court.
The Family History Library has not acquired copies of probate records in Washington. They are available at the various county courthouses, or the county may have transferred early records to the Washington State Archives at http://www.secstate.wa.gov/archives/.