List of counties in Washington

There are 39 counties in the U.S. state of Washington. Washington came from the western part of Washington Territory.  It was admitted to the Union as the 42nd state in 1889. The first counties were created from unorganized territory in 1845.

The Federal Information Processing Standard (FIPS) code, used by the United States government to uniquely identify counties, is provided with each entry. The FIPS code links in the table point to U. S. Census "quick facts" pages for each county.

List

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 Former county names 
 Sawamish County, originally named for the Sahewamish Native American tribe, was renamed Mason County in 1864.
 Slaughter County, originally named for Lieutenant William A. Slaughter who was killed during the Indian Wars, was renamed Kitsap County in 1857.

 Former counties 
 Ferguson County, named for Washington legislator James L. Ferguson, was formed on January 23, 1863 from Walla Walla County and ended on January 18, 1865. Yakima County was formed in its place.

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Washington
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