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.
NPIN/Illinois: Organizations: Williamson County: Services and Resources: Williamson County
Resources for Williamson county: Listing of services in Williamson county
Shawnee Library System: Includes information on services, contacts, and the Board of Directors.
The John A. Logan College Community Band: Information about the band and its members, officers, and director.
The Political Graveyard: Williamson County, Ill.: Politicians who were born or lived in Williamson county
Tiger Map Server Browser: Map based on census material for Williamson county.
U.S. Census Bureau: Williamson County, Illinois: Area map plus population, demographic, and housing information from the latest census.