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- the text in this section is copied from an article in Wikipedia
Jefferson County is a county located in the U.S. state of Washington. As of the 2020 census, the population was 32,977. The county seat and only incorporated city is Port Townsend. The county is named for Thomas Jefferson.
Jefferson County was formed out of Thurston County on December 22, 1852, by the legislature of Oregon Territory, and included the northern portion of the Olympic Peninsula. On April 26, 1854, the legislature of Washington Territory created Clallam County from the northwestern portion of this original area.
The Hood Canal Bridge connects Jefferson County to Kitsap County, Washington. The Coupeville-Port Townsend route of the Washington State Ferries connects the county to Whidbey Island in Island County, Washington.
Timeline
| Date | Event | Source
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| 1852 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1853 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1853 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1854 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1855 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1860 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1880 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1891 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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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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| 1860 | 531
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| 1870 | 1,268
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| 1880 | 1,712
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| 1890 | 8,368
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| 1900 | 5,712
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| 1910 | 8,337
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| 1920 | 6,557
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| 1930 | 8,346
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| 1940 | 8,918
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| 1950 | 11,618
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| 1960 | 9,639
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| 1970 | 10,661
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| 1980 | 15,965
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| 1990 | 20,146
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Cemeteries
Cemeteries of Jefferson County, Washington, United States
Research Tips
Resources
- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
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