Washington County records differ extensively from county to county in either quality and also quantity. Some are already carefully conserved while some have been substantially neglected and uncared for. Many Washington records have simply vanished. For genealogists performing research in Washington there’s no effective replace to have an on-site search of county courthouse records. For Definitions of all court terms see the Genealogy Encyclopedia
Washington is divided into 39 counties. Washington came from what was previously the western part of Washington Territory and was admitted to the Union as the 42nd state in 1889. The first counties were created from unorganized territory in 1845. Eight of the counties were created by Oregon governments prior to the organization of Washington Territory, 26 were created during Washington’s territorial period, and five were created after Washington became a state.
Most of the court, probate and land records for various counties were originally housed at the county seat. However, the regional branches of the state archives now house a lot of them. Many counties were grouped together under the same judicial jurisdictions. See also a list of links to county and county seat government run websites.