Welcome to Mason County

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Washington Genealogy and History
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County Information
Mason County was formed out of King County on March 13, 1854.
Originally named Sawamish County, it took its present name in 1864.

The county seat is at Shelton, the county's only incorporated city
Named after in honor of Charles H. Mason, the first Secretary of Washington Territory

Census Recognized Communities
Shelton City
Allyn-Grapeview * Kamilche * Skokomish

Other Communities
Belfair * Eldon * Harstine Island * Hoodsport * Lake Cushman
Lilliwaup * Matlock * Potlatch * Tahuya * Union

Online Data


Church Histories / Records

Death Records

Family Bibles

County History

Marriage Records

Miscellaneous Data

School Records

Wills/Probate Records

Website Updates:

October 2015: Obituary: Henrietta Richardson;
News article: Man Kills Three (1915)



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Adjacent Counties
Jefferson County, WA - northwest
Kitsap County, WA - northeast
Pierce County, WA - southeast
Thurston County, WA - southeast
Grays Harbor County, WA - southwest

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