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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 Iowa. As of the 2020 United States Census, the population was 15,663. The county seat is Fairfield. The county was formed in January 1839, and was named for United States President Thomas Jefferson, who had died in 1826.
Jefferson County comprises the Fairfield, IA Micropolitan Statistical Area.
Timeline
Date | Event | Source
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1838 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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1838 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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1839 | County formed | Source:Red Book: American State, County, and Town Sources
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1839 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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1840 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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1840 | First census | Source:Population of States and Counties of the United States: 1790-1990
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1840 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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1880 | 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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1840 | 2,773
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1850 | 9,904
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1860 | 15,038
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1870 | 17,839
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1880 | 17,469
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1890 | 15,184
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1900 | 17,437
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1910 | 15,951
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1920 | 16,440
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1930 | 16,241
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1940 | 15,762
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1950 | 15,696
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1960 | 15,818
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1970 | 15,774
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1980 | 16,316
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1990 | 16,310
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Cemeteries
Cemeteries of Jefferson County, Iowa, United States
Research Tips
External links
www.rootsweb.com/~iajeffer/
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