Category:Categories of Illinois by county
States of the United States: Alabama · Alaska · Arizona · Arkansas · California · Colorado · Connecticut · Delaware · Florida · Georgia · Hawaii · Idaho · Illinois · Indiana · Iowa · Kansas · Kentucky · Louisiana · Maine · Maryland · Massachusetts · Michigan · Minnesota · Mississippi · Missouri · Montana · Nebraska · Nevada · New Hampshire · New Jersey · New Mexico · New York · North Carolina · North Dakota · Ohio · Oklahoma · Oregon · Pennsylvania · Rhode Island · South Carolina · South Dakota · Tennessee · Texas · Utah · Vermont · Virginia · Washington · West Virginia · Wisconsin · Wyoming – District of Columbia: Washington, D.C.
 | This category should only contain other categories. Galleries should be in the corresponding categories instead. Files should be in a parent or subcategory. |
 | For convenience, all categories of Illinois by county should be included in this category. This includes all categories that can also be found in the subcategories. |
Subcategories
This category has the following 16 subcategories, out of 16 total.