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The estimated population of Washington state in 2007 was around 6.5 million people.
According to census.gov, King County, Washington, has the most population at 1,859,284 people in 2007.According to "Washington State" history book: King County with 1,685,600 as of 2000.
As of the 2000 Census, the population of Washington County Idaho is, 9,977.
Olympia is the capital of the U.S. state of Washington. The population of Olympia was 46,478 as of the 2010 census.
It was 8,494 in the 2000 census.
the establishment of a Washington State
In 2006 the population of Washington was 6,395,798.
The US state of Washington has a population of 6,664,195
Washington.
1,568,995,322,567,875,433,555
Washington with a population of 6,724,540.
The 2010 U. S. Census counted 6,724,540 people in the State of Washington, making it the 13th-largest U. S. state by population.