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King County Archives

A repository of county government records
King County Archives
1215 E. Fir St.
Building A
Seattle, WA 98122


Monday - Friday
9:00 am - 4:00 pm


Microfilm Research Room

Effective January 3, 2011, the King County Archives provides access to recorded documents filed with the King County Auditor (1853-1969) and the King County Recorder's Office (1969-present). This group of records includes deeds, mortgages, marriage records, and plats. The self-service research area has four microfilm reader stations and three public service terminals that provide access to digitized content. Archives staff are available to assist researchers.

Hours and Location

The microfilm research room is located at the King County Archives facility and is open to researchers, Monday-Friday from 9:00 AM to 4:00 PM (machines shut off automatically at 3:50 pm). Use of machines is first-come, first-served. No appointment is required for use, but there is a 15-minute time limit when other researchers are waiting.


The microfilm research room is free to use, but there is a fee of $1.00 per page for any copies (noncertified) that are made. Certified copies of recorded documents are available for an extra $2.00 per document.

Available Records

The resources in the microfilm research room include all indexes to recorded documents (microfilm from 1853-1975 and computer database from 1976-present).

In addition, access is provided to all recorded documents (microfilm from 1853 to 1991 and digital images from 1991 to present).

Conditions of Use

  • Each visitor is required to sign in at the front desk prior to using the resources in the research room
  • No food or drink is allowed in the research room
  • Use of machines is available on a first-come, first-served basis, but there is a 15-minute time limit when other researchers are waiting

To access other records (non-recorded documents) at the King County Archives or recorded documents not on microfilm, please contact Archives staff to schedule an appointment in our archival research room.