Place:Idaho, Idaho, United States

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source: Getty Thesaurus of Geographic Names
source: Family History Library Catalog


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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 of the area 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.

Contents

Timeline

Date Event Source
1862 Land records recorded Source:Red Book: American State, County, and Town Sources
1862 Marriage records recorded Source:Red Book: American State, County, and Town Sources
1864 County formed Source:Red Book: American State, County, and Town Sources
1865 Probate records recorded Source:Red Book: American State, County, and Town Sources
1870 Court records recorded Source:Red Book: American State, County, and Town Sources
1870 First census Source:Population of States and Counties of the United States: 1790-1990
1907 Birth records recorded Source:Red Book: American State, County, and Town Sources
1920 No significant boundary changes after this year Source:Population of States and Counties of the United States: 1790-1990

Population History

source: Source:Population of States and Counties of the United States: 1790-1990
Census Year Population
1870 849
1880 2,031
1890 2,955
1900 9,121
1910 12,384
1920 11,749
1930 10,107
1940 12,691
1950 11,423
1960 13,542
1970 12,891
1980 14,769
1990 13,783

Research Tips

External links

www.idahocounty.org


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