Texas Subcategories This category has the following 6 subcategories, out of 6 total. Companies based in Illinois by populated place (15 C) Museums in Illinois by populated place (4 C)C Organizations based in Chicago (31 C, 138 P)N Organizations based in Naperville, Illinois (1 C, 2 P)O Organizations based in LaSalle, Illinois (2 P)S Organizations based in Schaumburg, Illinois (1 C, 4 P)