Mason County, Washington Genealogy

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United States Gotoarrow.png Washington Gotoarrow.png Mason County

Hand and keyboard.jpg Washington
Online Records

Mason County, Washington
Map of Washington highlighting Mason County
Location in the state of Washington
Map of the U.S. highlighting Washington
Location of Washington in the U.S.
Founded March 13, 1854
County Seat Shelton
Address Mason County Courthouse
411 N 5th PO Box 340
Shelton, WA 98584
Phone 360.472.9670
Mason County Website

County Courthouse

Mason County Courthouse
411 N 5th PO Box 340
Shelton, WA 98584
Phone 360.472.9670

County Auditor has marriage records from 1892, death
records 1891-1906 and land records from 1850’s.
County Clerk has divorce, probate and court records. [1]

Quick History

3 January 1864: Renamed from  Sawamish County.

Parent County

13 March 1854: Mason County was created from Thurston County.  County seat: Shelton [2]

Boundary Changes

Record Loss

Places / Localities

Populated Places

Neighboring Counties

Grays Harbor | Jefferson | Kitsap | Pierce | Thurston




  • 1857
  • 1860
  • 1870
  • 1880
  • 1889
  • 1890 Veterans
  • 1900
  • 1910
  • 1920
  • 1930


LDS Ward and Branch Records

  • Shelton



Local Histories



Some military records for this county have been digitized at the Washington State Digital Archives.


  • Allyn Times - full-text digital issues in Google News Archive; covers 1889-1891



Vital Records

  • 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. Handybook for Genealogists: United States of America, 10th ed. (Draper, Utah: Everton Pub., 2002), Mason County, Washington page 733, At various libraries (WorldCat); FHL Book 973 D27e 2002.
  2. The Handybook for Genealogists: United States of America,10th ed. (Draper, UT:Everton Publishers, 2002).