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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
Richland County is a county located in the U.S. state of Illinois. As of 2000, the population is 16,149. Its county seat is Olney, Illinois.
Timeline
| Date | Event | Source
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| 1836 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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| 1841 | County formed | Source:Red Book: American State, County, and Town Sources
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| 1841 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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| 1841 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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| 1850 | First census | Source:Population of States and Counties of the United States: 1790-1990
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| 1850 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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| 1877 | 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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| 1850 | 4,012
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| 1860 | 9,711
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| 1870 | 12,803
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| 1880 | 15,545
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| 1890 | 15,019
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| 1900 | 16,391
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| 1910 | 15,970
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| 1920 | 14,044
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| 1930 | 14,053
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| 1940 | 17,137
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| 1950 | 16,889
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| 1960 | 16,299
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| 1970 | 16,829
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| 1980 | 17,587
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| 1990 | 16,545
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Research Tips
External links
www.rootsweb.com/~ilrichla/index.htm
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