King County, Washington Genealogy

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United States Gotoarrow.png Washington Gotoarrow.png King County

Guide to King County Washington genealogy. Birth records, marriage records, death records, census records, family history, and military records.

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Online Records

King County, Washington
Map of Washington highlighting King County
Location in the state of Washington
Map of the U.S. highlighting Washington
Location of Washington in the U.S.
Founded December 22, 1852
County Seat Seattle
Address King County Courthouse
516 3rd Avenue
Seattle, WA 98104
Phone: 206.296.1020
King County Website

Historical Facts

Beginning dates for major county records
* For earlier dates, try... Church | Obituaries | Cemeteries

Boundary Changes

Record Loss


Bible Records




Find A Grave: search and contribute to 168 King County cemeteries



  • 1860
  • 1870
  • 1880
  • 1890
  • 1890 Veterans
  • 1900
  • 1910
  • 1920
  • 1930


  • 1889
  • 1907

Church Records

LDS Ward and Branch Records

  • Queen Anne (Seattle)
  • Renton
  • Seattle S.
  • Seattle W.
  • University (Seattle)

Court Records

Emigration and Immigration

Ethnic, Political or Religious Groups




  • History and Progress of King County, Washington... 1916, by Henry C. Pigott. Digitalized book online from

Oral History

  • Olson, Diane and Cory, comp. and ed., Black Diamond: Mining the Memories, An oral history of life in a company town, (Seaside, Oregon: Frontier Publishing, 1988). FHL Book 979.777/B1 H2o The 1989 Washington Centennial project of the Black Diamond Historical Society, this book is a compilation of historical photographs and selections from the transcripts of over fifty oral history interviews.
  • University of Washington, Urban Design and Planning, Mining the Memories II, Black Diamond Oral History Project, (University of Washington: 2011). Summary of 2010 oral history project pdf for the Black Diamond Historical Society. A follow-up to the 1988 centennial project, students interviewed another twenty-two residents capturing the history of Black Diamond as the area transitioned from a coal mining company town, 1950s to present.

Land and Property



Naturalization and Citizenship

Washington State Digital Archives has digitized various types of naturalization-related records, including declarations of intentions, delayed birth files, naturalization affidavits, notifications of application for admission to US citizenship, orders fixing naturalization terms, petitions and records, petitions, receipts for certificates of citizenship, record of final decrees of citizenship and record of petitions dockets. Depending on the county, records range from 1854-1988.





A wiki article describing an online collection is found at:
Washington, King County Probate Records (FamilySearch Historical Records)

Public Records



King County Courthouse
516 3rd Avenue
Seattle, WA 98104
Phone: 206.296.1020

Records and Elections Division, Records Section has birth, marriage, death and land records from 1853. Clerk of the Superior Court has divorce, probate and county records. [2]

Family History Centers
  • Fiske Genealogical Foundation and Library - Located at 1644 43rd Ave. E., Seattle, WA 98112. Hours: Monday & Saturday 10:00 a.m. - 3 p.m.; Wednesday 12:00 - 8:00 p.m.; Thursday 3:00 - 8:00 p.m.; Friday by appt; 2nd Sunday from 1:00 - 4:00 p.m. Phone: 206-328-2716.
  • Black Diamond Historical Depot Museum
    32627 Railroad Ave
    Black Diamond WA 98010
    Franklin Tours: 253–852–6763
    Transit: Baker St and 3rd Ave
    Send e-mail to:

    Thursday 9 a.m. to 4 p.m.
    Saturday and Sunday (Summer) 12 to 4 p.m.
    Saturday and Sunday (Winter) 12 to 3 p.m.
  • Black Diamond Historical Society – The mission of the Black Diamond Historical Society shall be the discovery, preservation, and dissemination of the history of Black Diamond and environs, as it relates to King County and the State of Washington. Like us on facebook Black Diamond History
  • Eastside Genealogical Society – Library holdings are located at the Bellevue Regional Library, a part of the King County Library System. Meetings are held at 7:00 p.m. on the 2nd Thursday of the month at the Bellevue Regional Library at 1111 110th Ave. N.E., Bellevue, WA 98004. Check the website for more information on the various interest groups that meet as a part of EGS.
  • Seattle Genealogical Society – Library located at 6200 Sand Point Way N.E., #101, Seattle, WA 98115. Hours: Tuesday - Saturday 10:00a.m. - 3:00 p.m. and Wednesday until 8:00 p.m. Check the website for the society meeting schedule and a listing of the various interest groups that meet as a part of SGS.


Vital Records


Washington State Digital Archives has a database of King County Birth Records. This database contains the names of people who were born in King County from 1891-1907.


To obtain copies of marriage records from King County, go to the following website: The website offers a link to an online search for marriage records 1855-1989, which includes images.




Incorporated Cities

Algona - 2,775
Auburn - 68,270 (Orig. Slaughter)
Beaux Arts Village - 320
Bellevue - 122,900
Black Diamond - 4,190
Bothell - 33,430
Burien - 31,730
Carnation - 1,915
Clyde Hill - 2,845
Covington - 17,640
Des Moines - 29,290
Duvall - 5,990
Enumclaw - 11,490
Federal Way - 88,760
Hunts Point - 470
Issaquah - 27,160 (Orig. Gilman)
Kenmore - 20,650
Kent - 88,760
Kirkland - 84,830
Lake Forest Park - 12,840
Maple Valley - 21,130
Medina 2,980
Mercer Island - 22,280
New Castle - 9,955
Normandy Park - 6,540
North Bend - 5,665
Pacific - 6,305
Redmond - 53,680
Renton - 86,230
Sammamish - 41,070
SeaTac - 25,890
Seattle - 612,000 (Largest City and County Seat)
Shoreline - 54,580
Skykomish - 225
Snoqualmie 9,850
Tukwila - 18,190 (Orig. Foster)
Woodinville - 11,350
Yarrow Point - 995

King County Washington Genealogy References

  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).
  2. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Ferry County, Washington page 732, At various libraries (WorldCat); FHL Book 973 D27e 2002.