Cowlitz County, Washington GenealogyEdit This Page

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United States > Washington > Cowlitz County


County Courthouse

Cowlitz County; 207 4th Ave N; Kelso, WA 98626-1798; Ph. 360.577.3016 Details: (Co Aud has m rec from 1867, d rec 1891-1907 & land rec; Co Clk has div, pro & ct rec from 1874, nat & adoption rec from 1869)


Parent County

1854--Cowlitz County was formed  21 April 1854 from Lewis County.  County seat: Kelso [1]

Boundary Changes

Record Loss

Places / Localities

Populated Places

Neighboring Counties

Clark | Lewis | Skamania | Wahkiakum | Columbia County, Oregon




  • 1860
  • 1870
  • 1880
  • 1883
  • 1885
  • 1890 Veterans
  • 1900
  • 1910
  • 1920
  • 1930


LDS Ward and Branch Records

  • Kelso



Local Histories




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.




Vital Records

  • Marriages from 9 Nov 1854 to 18 Sep 1887 are available on the Western States Marriage Index website.
  • Washington Death Certificates 1907-1960 A free internet index to the 1907-1960 death certificates can be found at FamilySearch Record Search, no images are available. A transcribed death certificate may contain such information as name of the deceased, date and place of death, age, gender, birth date and birth place, mother’s maiden name and name of spouse, place of residence, occupation and certificate numbers.

Societies and Libraries

Family History Centers

Web Sites


  1. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).


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