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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
Clay County is a county located in the U.S. state of Iowa. The population was 16,667 in the 2010 census, a decline from 17,372 in 2000.[1][2] Its name is in honor of Henry Clay, Jr. a colonel who died in action in the Mexican-American War, and son of Henry Clay, famous American statesman. Its county seat is Spencer. It also holds the annual Clay County Fair. The very first newspaper in Clay County was the Peterson Patriot which started circulation in 1880.
Timeline
| Date | Event | Source
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| 1851 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1858 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1860 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1860 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1866 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1870 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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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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| 1860 | 52
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| 1870 | 1,523
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| 1880 | 4,248
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| 1890 | 9,309
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| 1900 | 13,401
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| 1910 | 12,766
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| 1920 | 15,660
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| 1930 | 16,107
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| 1940 | 17,762
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| 1950 | 18,103
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| 1960 | 18,504
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| 1970 | 18,464
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| 1980 | 19,576
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| 1990 | 17,585
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Research Tips
External links
http://iagenweb.org/clay/
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