File:Lake County Illinois 1839.pngThis 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
File:Illinois Locator Map.PNGCounty Illinois 1836.png LaSalle County Illinois 1837.png LaSalle County Illinois 1841.png LaSalle County Illinois 1843.png Lake County Illinois 1839.png Lawrence