This image is a derivative work of the following images: File:Illinois_Locator_Map.PNG licensed with Cc-by-sa-2.5, Cc-by-sa-3.0-migrated, GFDL, PD-USGov-DOC-Census...
County Illinois 1843.png McDonough County Illinois 1826.png McHenry County Illinois 1836.png McHenry County Illinois 1839.png McLean County Illinois 1831...