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- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
- the text in this section is copied from an article in Wikipedia
Kittitas County is a county located in the U.S. state of Washington. At the 2020 census, its population was 44,337. Its county seat and largest city is Ellensburg. The county was created in November 1883 when it was carved out of Yakima County. Kittitas County comprises the Ellensburg, Washington, Micropolitan Statistical Area.
There are numerous interpretations of the county's name, which is from the language of the Yakama Nation. According to one source, it "has been said to mean everything from 'white chalk' to 'shale rock' to 'shoal people' to 'land of plenty'". Most anthropologists and historians concede that each interpretation has some validity depending upon the particular dialect spoken.
Timeline
| Date | Event | Source
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| 1872 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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| 1882 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1882 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1883 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1884 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1884 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1890 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1900 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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Population History
- source: Source:Population of States and Counties of the United States: 1790-1990
| Census Year | Population
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| 1890 | 8,777
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| 1900 | 9,704
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| 1910 | 18,561
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| 1920 | 17,737
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| 1930 | 18,154
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| 1940 | 20,230
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| 1950 | 22,235
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| 1960 | 20,467
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| 1970 | 25,039
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| 1980 | 24,877
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| 1990 | 26,725
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