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King County Road Services - Map and Records Center

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Map Vault
Map Vault 		Map Counter
Map Counter 		 Research resources
Research resources 

About us

The King County Map and Records Center is a repository for documents associated with the establishment and construction of roads in unincorporated King County for the King County Road Services Division.

Our records collection includes design and construction project files, correspondence, contracts, agreements, safety studies, field books and technical reports. We also keep a collection of engineering drawings for road projects, topographic maps, Engineers’ maps, plat maps, section breakdowns and road establishment documents.

The Map Counter at the King County Map and Records Center is open Monday – Friday from 8 a.m. to 4:30 p.m., except on government holidays and county furlough days. We're located in the King Street Center Building in historic Pioneer Square in downtown Seattle. View our contact information and driving directions.

Download a copy of our Map and Records Center brochure to learn more about what we do and who we are. (3MB .pdf)

Contact us

King County Road Services Division
Map and Records Center
KSC-TR-0106
201 South Jackson St., 1st Floor
Seattle, WA 98104-3856
206-296-6548
Fax: 206-205-7350
E-mail: map.roads@kingcounty.gov

Related topics

Did you know?

A baseline is a reference or beginning point for measuring north or south townships. Our baseline in King County is the Willamette Baseline.

Map Vault treasures

Map treasure: Proposed Union Bay Trestle drawing show location of the Alaska-Yukon-Pacific Exposition grounds.
In honor of the Alaska-Yukon-Pacific Exposition Centennial, this month’s featured Map Treasure is a drawing from a 1908 survey for a proposed Union Bay Trestle showing the location of the Exposition grounds. Do a little treasure hunting of your own and explore the Map Vault!