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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
Idaho County is a county located in the U.S. state of Idaho. As of the 2010 Census, the county had a population of 16,267. The county seat is Grangeville. Previous county seats were Florence (1864–75) and Mount Idaho (1875–1902).
Idaho County was originally founded as a region of Washington Territory in 1861, named for a steamer called Idaho that was launched on the Columbia River in 1860. It was reorganized by the Idaho Territorial Legislature on February 4, 1864. In this context, the name of the county predates both the Idaho Territory and the State of Idaho.
Idaho County is one of seven counties in the United States that has the same name as the state in which it lies. The other six are Arkansas, Hawaii, Iowa, New York, Oklahoma, and Utah.
Timeline
| Date | Event | Source
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| 1862 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1862 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1864 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1865 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1870 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1870 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1907 | Birth records recorded | Source:Red Book: American State, County, and Town Sources
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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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| 1870 | 849
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| 1880 | 2,031
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| 1890 | 2,955
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| 1900 | 9,121
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| 1910 | 12,384
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| 1920 | 11,749
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| 1930 | 10,107
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| 1940 | 12,691
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| 1950 | 11,423
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| 1960 | 13,542
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| 1970 | 12,891
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| 1980 | 14,769
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| 1990 | 13,783
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Research Tips
External links
www.idahocounty.org
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