Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Cedar Point | Cedar Point, IL |
| Illinois | Cedarville | Cedarville, IL |
| Illinois | Centralia | Centralia, IL |
| Illinois | Cerro Gordo | Cerro Gordo, IL |
| Illinois | Chadwick | Chadwick, IL |
| Illinois | Chambersburg | Chambersburg, IL |
| Illinois | Champaign | Champaign, IL |
| Illinois | Chana | Chana, IL |
| Illinois | Chandlerville | Chandlerville, IL |
| Illinois | Channahon | Channahon, IL |
| Illinois | Chapin | Chapin, IL |
| Illinois | Charleston | Charleston, IL |
| Illinois | Chatham | Chatham, IL |
| Illinois | Chatsworth | Chatsworth, IL |
| Illinois | Chebanse | Chebanse, IL |
| Illinois | Chenoa | Chenoa, IL |
| Illinois | Cherry | Cherry, IL |
| Illinois | Cherry Valley | Cherry Valley, IL |
| Illinois | Chester | Chester, IL |
| Illinois | Chesterfield | Chesterfield, IL |
| Illinois | Chestnut | Chestnut, IL |
| Illinois | Chicago | Chicago, IL |
| Illinois | Chicago Heights | Chicago Heights, IL |
| Illinois | Chicago Ridge | Chicago Ridge, IL |
| Illinois | Chillicothe | Chillicothe, IL |