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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


About the Archives

Mission Statement

To serve the public and agencies of King County by collecting, preserving, holding in trust, and facilitating access to County records of enduring historical value that document its land, people, culture, and governance. Through our service, we strive to foster appreciation and understanding of King County’s origins and continuing history.


We currently maintain a record capacity of 18,000 cubic feet in an 8,700 square foot climate-controlled repository. With holdings dating back to 1853 and which include over three hundred collections, we serve as a permanent source of information about the activities, programs, and decisions of County agencies and elected officials. The majority of our records, however, date from the mid-twentieth century. Some King County government records are also held by the Puget Sound Regional Branch of the Washington State Archives (external link), which began collecting materials before the establishment of the King County Archives program in 1990.

Our collection is limited to those records created by King County government and come in many formats including paper, photographs, maps, oral histories and other recordings. They include legislative records--County Commissioner's resolutions (1853-1968) and County Council ordinances and motions (1969-1999), a special collection of over 6,000 County documents, pre-charter legislation, administration and policy decisions, early road and bridge establishment and inspection records and records and policies from former County Executives.

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Frequently Asked Questions

Research and service fees