| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Crab Orchard | city | Illinois | United States | 37.73 | -88.80 | 830 | |
| Crab Orchard Estates | city | Illinois | United States | 37.75 | -89.15 | 830 | |
| Cragin | city | Illinois | United States | 41.92 | -87.76 | 830 | |
| Crain | city | Illinois | United States | 37.78 | -89.51 | 393 | |
| Crainville | city | Illinois | United States | 37.75 | -89.07 | 830 | |
| Cramer | city | Illinois | United States | 40.69 | -89.95 | 830 | |
| Crandall | city | Illinois | United States | 40.63 | -89.43 | 830 | |
| Crane Road Estates | city | Illinois | United States | 41.94 | -88.33 | 830 | |
| Crane Woods Estates | city | Illinois | United States | 41.93 | -88.35 | 830 | |
| Cravat | city | Illinois | United States | 38.42 | -89.09 | 830 | |
| Crawford | city | Illinois | United States | 41.85 | -87.73 | 830 | |
| Crawford Corners | city | Illinois | United States | 42.50 | -87.99 | 830 | |
| Crawford Countryside | city | Illinois | United States | 41.52 | -87.71 | 830 | |
| Crawfordsville (historical) | city | Illinois | United States | 38.87 | -87.67 | 830 | |
| Creal Springs | city | Illinois | United States | 37.62 | -88.84 | 830 | |
| Creamery Corners | city | Illinois | United States | 42.28 | -87.88 | 830 | |
| Creekside | city | Illinois | United States | 42.08 | -88.03 | 830 | |
| Creekside of Long Grove | city | Illinois | United States | 42.23 | -88.02 | 830 | |
| Creekwood | city | Illinois | United States | 41.65 | -87.97 | 830 | |
| Crenshaw Crossing | city | Illinois | United States | 37.77 | -88.98 | 830 | |
| Crescent | city | Illinois | United States | 40.55 | -89.67 | 830 | |
| Crescent City | city | Illinois | United States | 40.77 | -87.86 | 830 | |
| Crest Estates | city | Illinois | United States | 41.56 | -88.14 | 830 | |
| Crest Hill | city | Illinois | United States | 38.54 | -90.08 | 830 | |
| Crest Hill | city | Illinois | United States | 41.55 | -88.10 | 830 | |
| Creston | city | Illinois | United States | 41.93 | -88.96 | 902 | |
| Crestview Knolls | city | Illinois | United States | 41.69 | -88.20 | 830 | |
| Crestwood | city | Illinois | United States | 41.66 | -87.75 | 830 | |
| Crestwood | city | Illinois | United States | 37.60 | -88.94 | 830 | |
| Crestwood Acres | city | Illinois | United States | 41.93 | -89.15 | 830 | |
| Crete | city | Illinois | United States | 41.44 | -87.63 | 830 | |
| Creve Coeur | city | Illinois | United States | 40.65 | -89.59 | 830 | |
| Crisp | city | Illinois | United States | 38.44 | -88.60 | 830 | |
| Croft | city | Illinois | United States | 40.05 | -89.59 | 830 | |
| Cropsey | city | Illinois | United States | 40.61 | -88.48 | 830 | |
| Cross Roads (historical) | city | Illinois | United States | 37.47 | -88.78 | 830 | |
| Crossing | city | Illinois | United States | 41.72 | -88.17 | 830 | |
| Crossroads | city | Illinois | United States | 37.35 | -88.82 | 830 | |
| Crossroads | city | Illinois | United States | 38.59 | -89.97 | 830 | |
| Crossville | city | Illinois | United States | 38.16 | -88.07 | 400 | |
| Cruger | city | Illinois | United States | 40.72 | -89.31 | 830 | |
| Cruse | city | Illinois | United States | 38.82 | -88.68 | 830 | |
| Crystal Gardens | city | Illinois | United States | 42.23 | -88.38 | 889 | |
| Crystal Lake | city | Illinois | United States | 42.24 | -88.32 | 898 | |
| Crystal Lake Estates | city | Illinois | United States | 41.57 | -87.94 | 830 | |
| Crystal Lawns | city | Illinois | United States | 41.57 | -88.16 | 830 | |
| Crystal Manor | city | Illinois | United States | 42.22 | -88.29 | 889 | |
| Crystal Vista | city | Illinois | United States | 42.24 | -88.37 | 889 |