- south
*Kittitas County - southwest
*Chelan County - west

Demographics

2020 census

As of the 2020 census, the county had a population of 42,938. Of the residents, 25.0% were under the age of 18 and 18.0% were 65 years of age or older; the median age was 38.4 years. For every 100 females there were 101.5 males, and for every 100 females age 18 and over

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