Illinois Genealogy Local Resources

Research Tools

 * County Creation Dates for Illinois
 * Sortable table with links to historical boundary changes
 * Interactive outline map of Illinois Historical Counties at Newberry Library site (Free)
 * Enter a year, Refresh Map, select zoom in, then click on the map to enlarge it.Interactive map of county boundaries through the years (Newberry Library)
 * Interactive Map of Illinois County Formation History at MapofUS.org (Free)
 * Select a year, or Play to cycle through the years.