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Jefferson County, Illinois
Genealogy, History & Facts

Jefferson County, Illinois Facts

When was Jefferson County, IL Created?
Jefferson County was established on March 26, 1819.

What is the County Seat of Jefferson County, IL?
The County Seat is located in Mount Vernon also, the county government website is .

What counties are adjacent to Jefferson County, IL?
Bordering Counties are  Marion CountyWayne CountyHamilton CountyFranklin CountyPerry CountyWashington County

Jefferson County, IL Census Records

What Jefferson County, IL census records are available?
There are many types of census records for Jefferson County guide you in researching your family tree. Federal Population Schedules are available for 1820183018401850186018701880 (free index)1890 (fragment)19001910192019301940.

Jefferson Co. Mortality Schedules can be found for 1850, 1860, 1870 and 1880. Jefferson Co. Industry and Agriculture can be obtained for 1850, 1860, 1870 and 1880. Jefferson Co. Union Veterans Schedules is available for 1890. One can find free online and printable census forms to help you with your research. See Also Illinois Census Records Research Guide

Jefferson County, IL Courthouse and Government Records

Jefferson County Courthouse

What genealogical records can I find in the Jefferson County Courthouse?
Researchers frequently overlook the great importance of Jefferson County court, probate, and land records data as a useful resource of ancestry and genealogy information. Buried away in Illinois courthouses and archives everywhere are the ambitions and frustrations of countless Illinois residents.

The possibilities are excellent that your forefathers have left a comprehensive document of at least a number of facets of their lives in the Jefferson County court records. Even if your forebears is not referred to in a Court case, contemplate all of the other procedures that could have lead to him or her to appear in court records. See Also Illinois Corthouse Records Research Guide.

Jefferson County, IL Societies and Family History Resources

What genealogical and historical societies, archives, museums, associations and libraries are available for Jefferson County, IL?
A list of Jefferson County Historical  and Genealogical Societies, Libraries, Archives. See also list of Statewide Illinois Archives, Historical & Genealogical Societies.

Where can I connect with other Jefferson County, IL Researchers through message boards and forums?

What other genealogical resources are available in Jefferson County, IL?
The following are web links to Genealogy, Records and Resources pertaining to Jefferson County. These genealogy links fall into 3 categories: Commercial Sites, Private Sites or Organization Sites. Some have free access some require a cost. This is simply a collection that has been gathered or submitted. I do not recommend or promote one genealogy site over another.

Jefferson Co. IL Maps, Atlases & Gazetteers

Jefferson Co. IL Books, Newspapers & Publications

Jefferson Co. IL Cemeteries & Church Records

Jefferson Co. IL Family Websites, Pictures & Histories

Jefferson Co. IL General and History Websites

Jefferson Co. IL Military Records