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- the text in this section is copied from an article in Wikipedia
Seneca County is a county located in the northwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 55,069. Its county seat is Tiffin. The county was created in 1820 and organized in 1824. It is named for the Seneca Indians, the westernmost nation of the Iroquois Confederacy, which was based in present-day New York but had territory into Pennsylvania and Ohio.[1]
Seneca County comprises the Tiffin, OH Micropolitan Statistical Area, which is also included in the Findlay-Tiffin, OH Combined Statistical Area.
Timeline
Date | Event | Source
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1820 | County formed | Source:Red Book: American State, County, and Town Sources
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1821 | Land records recorded | Source:Red Book: American State, County, and Town Sources
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1824 | Court records recorded | Source:Red Book: American State, County, and Town Sources
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1828 | Probate records recorded | Source:Red Book: American State, County, and Town Sources
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1830 | First census | Source:Population of States and Counties of the United States: 1790-1990
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1830 | No significant boundary changes after this year | Source:Population of States and Counties of the United States: 1790-1990
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1841 | Marriage records recorded | Source:Red Book: American State, County, and Town Sources
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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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1830 | 5,159
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1840 | 18,128
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1850 | 27,104
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1860 | 30,868
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1870 | 30,827
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1880 | 36,947
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1890 | 40,869
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1900 | 41,163
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1910 | 42,421
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1920 | 43,176
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1930 | 47,941
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1940 | 48,499
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1950 | 52,978
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1960 | 59,326
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1970 | 60,696
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1980 | 61,901
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1990 | 59,733
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Cemeteries
Cemeteries of Seneca County, Ohio, United States
Research Tips
My Seneca cemetery page
click on the PicoSearch and enter surname and the search results will show any of my pages that have that surname on it.
If you go to the Tiffin library, they have a whole section devoted to genealogy. It is wonderful. When you visit, stop by the research desk, tell them it is your first time there and you would please like to have a tour of what is available for genealogy research.
Resources
- source: Getty Thesaurus of Geographic Names
- source: Family History Library Catalog
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