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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
Jefferson County is a county located in the U.S. state of Idaho. As of the 2020 Census, the county's population was 30,891. In the 2010 census, the population was 26,140. The county seat and largest city is Rigby. The county was established in 1913 and named after Thomas Jefferson, the third U.S. President. Jefferson County is part of the Idaho Falls, ID Metropolitan Statistical Area.
Timeline
Date | Event | Source
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1891 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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1901 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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1913 | County formed | Source:Red Book: American State, County, and Town Sources
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1913 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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1914 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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1920 | First census | Source:Population of States and Counties of the United States: 1790-1990
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1920 | 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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1920 | 9,441
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1930 | 9,171
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1940 | 10,762
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1950 | 10,495
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1960 | 11,672
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1970 | 11,619
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1980 | 15,304
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1990 | 16,543
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Cemeteries
Cemeteries of Jefferson County, Idaho, United States
Research Tips
External links
www.co.jefferson.id.us/
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