| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Chadwick | city | Illinois | United States | 42.01 | -89.89 | 830 | |
| Chalfin Bridge | city | Illinois | United States | 38.21 | -90.27 | 830 | |
| Challacombe | city | Illinois | United States | 39.22 | -90.12 | 830 | |
| Chambersburg | city | Illinois | United States | 39.82 | -90.66 | 830 | |
| Chamness (historical) | city | Illinois | United States | 37.68 | -88.99 | 830 | |
| Champaign | city | Illinois | United States | 40.12 | -88.24 | 830 | |
| Champion Creek | city | Illinois | United States | 41.68 | -88.21 | 830 | |
| Champlin | city | Illinois | United States | 40.78 | -88.55 | 830 | |
| Chana | city | Illinois | United States | 41.98 | -89.22 | 830 | |
| Chandlerville | city | Illinois | United States | 40.05 | -90.16 | 830 | |
| Channahon | city | Illinois | United States | 41.43 | -88.23 | 830 | |
| Channel Lake | city | Illinois | United States | 42.48 | -88.14 | 830 | |
| Chapel Hill | city | Illinois | United States | 42.18 | -88.10 | 853 | |
| Chapel Hill Estates | city | Illinois | United States | 42.13 | -87.82 | 830 | |
| Chapin | city | Illinois | United States | 39.88 | -88.77 | 830 | |
| Chapin | city | Illinois | United States | 39.77 | -90.40 | 830 | |
| Chapman | city | Illinois | United States | 39.11 | -89.32 | 830 | |
| Charlemagne | city | Illinois | United States | 42.14 | -87.88 | 830 | |
| Charlemagne East | city | Illinois | United States | 42.14 | -87.87 | 830 | |
| Charleston | city | Illinois | United States | 39.50 | -88.18 | 830 | |
| Charlotte | city | Illinois | United States | 40.82 | -88.29 | 830 | |
| Charlottes Trailer Court | city | Illinois | United States | 40.74 | -89.01 | 830 | |
| Charlottsville (historical) | city | Illinois | United States | 38.83 | -87.76 | 830 | |
| Charring Cross | city | Illinois | United States | 42.14 | -87.80 | 830 | |
| Charter Grove | city | Illinois | United States | 42.07 | -88.63 | 879 | |
| Chatham | city | Illinois | United States | 39.68 | -89.70 | 830 | |
| Chatham | city | Illinois | United States | 41.74 | -87.61 | 830 | |
| Chatham Fields | city | Illinois | United States | 41.75 | -87.61 | 830 | |
| Chatsworth | city | Illinois | United States | 40.75 | -88.29 | 830 | |
| Chatton | city | Illinois | United States | 40.15 | -91.03 | 830 | |
| Chauncey | city | Illinois | United States | 38.84 | -87.87 | 830 | |
| Chautauqua | city | Illinois | United States | 38.96 | -90.39 | 830 | |
| Chautauqua Park | city | Illinois | United States | 40.32 | -90.05 | 830 | |
| Chebanse | city | Illinois | United States | 41.00 | -87.91 | 830 | |
| Checkrow | city | Illinois | United States | 40.55 | -90.38 | 830 | |
| Cheltenham | city | Illinois | United States | 41.75 | -87.56 | 830 | |
| Chemung | city | Illinois | United States | 42.42 | -88.67 | 898 | |
| Cheneyville | city | Illinois | United States | 40.47 | -87.58 | 830 | |
| Chenoa | city | Illinois | United States | 40.74 | -88.72 | 830 | |
| Cherry | city | Illinois | United States | 41.43 | -89.21 | 830 | |
| Cherry Hill | city | Illinois | United States | 41.52 | -88.01 | 830 | |
| Cherry Hill Estates | city | Illinois | United States | 38.43 | -87.76 | 416 | |
| Cherry Lane Estates | city | Illinois | United States | 39.90 | -91.38 | 830 | |
| Cherry Point | city | Illinois | United States | 39.80 | -87.72 | 830 | |
| Cherry Valley | city | Illinois | United States | 42.23 | -88.95 | 830 | |
| Cherry Wood Trailer Park | city | Illinois | United States | 39.56 | -89.31 | 830 | |
| Cherrywood | city | Illinois | United States | 41.70 | -88.07 | 830 | |
| Cheshire Hills | city | Illinois | United States | 39.94 | -91.35 | 830 | |
| Chesnut Pointe | city | Illinois | United States | 41.54 | -88.00 | 830 | |
| Chester | city | Illinois | United States | 37.91 | -89.82 | 830 | |
| Chester Highlands | city | Illinois | United States | 41.75 | -87.65 | 830 | |
| Chesterfield | city | Illinois | United States | 39.26 | -90.06 | 830 | |
| Chestervale | city | Illinois | United States | 40.09 | -89.32 | 830 | |
| Chesterville | city | Illinois | United States | 39.70 | -88.39 | 830 | |
| Chestline | city | Illinois | United States | 39.84 | -90.96 | 830 | |
| Chestnut | city | Illinois | United States | 40.05 | -89.19 | 830 | |
| Cheyenne Heights | city | Illinois | United States | 42.20 | -89.05 | 830 | |
| Chi-kâ-kô | city | Illinois | United States | 41.85 | -87.65 | 830 | |
| Chicago | city | Illinois | United States | 41.85 | -87.65 | 830 | |
| Chicago Heights | city | Illinois | United States | 41.51 | -87.64 | 830 | |
| Chicago Lawn | city | Illinois | United States | 41.78 | -87.70 | 830 | |
| Chicago Ridge | city | Illinois | United States | 41.70 | -87.78 | 830 | |
| Chicagu | city | Illinois | United States | 41.85 | -87.65 | 830 | |
| Chickasaw | city | Illinois | United States | 41.63 | -87.95 | 830 | |
| Chicken Bristle | city | Illinois | United States | 39.84 | -88.37 | 830 | |
| Chikago | city | Illinois | United States | 41.85 | -87.65 | 830 | |
| Childers Acres | city | Illinois | United States | 41.92 | -89.13 | 830 | |
| Chili | city | Illinois | United States | 40.22 | -91.14 | 830 | |
| Chillicothe | city | Illinois | United States | 40.92 | -89.49 | 830 | |
| Chinatown | city | Illinois | United States | 41.85 | -87.63 | 830 | |
| Chinatown | city | Illinois | United States | 38.73 | -89.95 | 830 | |
| Chippewa | city | Illinois | United States | 42.02 | -88.42 | 902 | |
| Chipps | city | Illinois | United States | 39.63 | -88.58 | 830 | |
| Chittenden | city | Illinois | United States | 42.38 | -87.90 | 830 | |
| Chittyville | city | Illinois | United States | 37.83 | -89.03 | 390 | |
| Choat | city | Illinois | United States | 37.21 | -88.80 | 396 | |
| Choctaw | city | Illinois | United States | 39.28 | -87.72 | 830 | |
| Chrisman | city | Illinois | United States | 39.80 | -87.67 | 830 | |
| Christopher | city | Illinois | United States | 37.97 | -89.05 | 830 | |
| Churchill | city | Illinois | United States | 41.39 | -89.17 | 830 | |
| Churchville | city | Illinois | United States | 41.94 | -87.95 | 830 |