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FamilySearch Wiki - Union County, Illinois

Free online Union County, Illinois genealogical research guide.

Genealogy Inc. - Union County, Illinois Facts, Genealogy, Records & Links

Genealogy Trails - Illinois Trails History & Genealogy - Union County

Linkpendium - Union County, Illinois

NACo (National Association of Counties) - County Explorer

Official County Web Site

USGenWeb

USGenWeb Archives