Washington Counties

Washington Counties

by Vishul Malik



The organization of counties is addressed in the Washington State Constitution’s Article XI. As per the state constitution, a new county must have a population of at least 2,000 people. A petition is required for altering a county area from a majority of registered voters. While the state capital (Olympia) is located within Thurston County, the largest city (Seattle) is located in King county.

How Many Counties in Washington

The US State of Washington (situated in the Western United States’ Pacific Northwest region) has 39 counties. Check this Washington County Map which provides the location of all counties on the Washington Map.




Counties of Washington

What are the 5 Biggest Counties in Washington by Size?

The biggest counties in Washington are Okanogan County, Yakima County, Chelan County, Grant County, and Stevens County.


What are the 5 Biggest Counties in Washington by Population?

In terms of population (2020), the biggest counties in Washington are King County, Pierce County, Snohomish County, Spokane County, and Clark County. 

Which is the Smallest County in Washington?

The smallest county in Washington (in terms of population) is Garfield County. San Juan County is the smallest county in terms of size. 

What are the Oldest and Newest Counties in Washington?

Clark County and Lewis County are the oldest counties in Washington, created in 1845. Pend Oreille County is the newest county, created in 1911.


Which are the Richest and Poorest Counties in Washington?

  • King County is the richest county in Washington. Its median annual household income (2019) is US$94,974.
  • Ferry County is the poorest county in Washington. Its median annual household income (2019) is US$41,939.

What are the top 5 Best Counties to Live in Washington?

Island County, San Juan County, Kitsap County, King County, and Clark County are Washington’s best counties to live in.

Whatcom County Map, Washington

Check this Washington County Map to locate all the state’s counties in Washington Map. Facts about Whatcom county in Washington County Name Whatcom county Population 2,08,351 Founded 9 March 1854 Area 2,503 sq…

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Whitman County Map, Washington

Check this Washington County Map to locate all the state’s counties in Washington Map. Facts about Whitman county in Washington County Name Whitman county Population 46,827 Founded 29 November 1871 Area 2,178 sq…

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