Named after Williamson County in Tennessee through the influence of emigrants from that county. Established: February 28, 1839 County Seat: Marion

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American History and Genealogy Project, The: Williamson County, Illinois
A genealogy and history site which includes many records and where county and surname researchers can submit material, connect, and help each other.
Illinois Clean Coal Institute (ICCI)
Research and development program with emphasis on continued utilization, environmentally clean burning, and new markets for Illinois Basin coals. News and events, research, and staff listing.
The Political Graveyard: Williamson County, Ill.
Politicians who were born or lived in Williamson county
U.S. Census Bureau: Williamson County, Illinois
Area map plus population, demographic, and housing information from the latest census.
Williamson County Illinois Historical Society
Local history preservation and discussion group.
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May 6, 2016 at 16:03:16 UTC
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