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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
Clark County is a county located in the state of Ohio, United States. According to the 2010 census, it has a population of 138,333, which is a decrease of 4.4% from 144,742 in 2000. It is included in the Springfield, Ohio Metropolitan Statistical Area.
The county was created on March 1, 1818, and was named for General George Rogers Clark, a hero of the American Revolution. Its county seat is Springfield.
Timeline
| Date | Event | Source
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| 1818 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1818 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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| 1818 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1818 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1818 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1820 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1820 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1867 | 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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| 1820 | 9,533
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| 1830 | 13,114
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| 1840 | 16,882
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| 1850 | 22,178
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| 1860 | 25,300
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| 1870 | 32,070
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| 1880 | 41,948
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| 1890 | 52,277
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| 1900 | 58,939
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| 1910 | 66,435
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| 1920 | 80,728
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| 1930 | 90,936
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| 1940 | 95,647
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| 1950 | 111,661
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| 1960 | 131,440
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| 1970 | 157,115
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| 1980 | 150,236
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| 1990 | 147,548
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Research Tips
External links
www.rootsweb.com/~ohclark/
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