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Most King County offices will be closed on Monday, May 28, for Memorial Day.  
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NEW! Request marriage records, deeds, and other King County recorded documents online

Now you can request certified or non-certified copies of recorded documents using our online form!

  • Marriage certificates and applications
  • Property records like deeds, mortgages, surveys, and easements
  • DD-214 forms that were recorded at the King County Recorder's Office
  • Name change orders that were recorded at the King County Recorder's Office

We'll research your request and scan available documents from microfilm, then contact you with payment information and/or additional resources. You can pay online, by mail, or in person.

Take me to the form!     I want to learn about other records available at the Archives.

Building history research

This in-depth research guide, Researching the History of Seattle and King County Buildings (PDF) walks you through many resources and strategies for researching the history of local buildings.

Published by Seattle Public Library Special Collections (external link), the guide was revised in 2014 in collaboration with the King County Archives to expand its coverage beyond Seattle city limits to all of King County.

Our mission is to collect, preserve, and provide access to historical County records

...to document the history of King County's land, people, culture, and governance

...to foster appreciation and understanding of King County's ongoing history

...and to support civic engagement and transparency in King County government.

TTY Relay 711

Monday, Tuesday, Thursday, and Friday: 9 am-4 pm

Please note the Archives is closed Wednesdays.