Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Coles Elementary School | School | 178 | Cook | 41 44 30 N | 087 33 53 W |
| Coles Lake | Reservoir | 165 | Greene | 39 19 54 N | 090 11 42 W |
| Coles Lake (historical) | Lake | 135 | Clinton | 38 39 00 N | 089 18 27 W |
| Coles Lake Dam | Dam | 165 | Greene | 39 19 54 N | 090 11 42 W |
| Coles Park | Park | 210 | Lake | 42 19 58 N | 087 51 43 W |
| Coleta | Populated Place | 249 | Whiteside | 41 54 08 N | 089 48 08 W |
| Colfax | Populated Place | 230 | McLean | 40 34 01 N | 088 36 59 W |
| Colfax Creek | Stream | | McLean | 40 33 57 N | 088 37 23 W |
| Colfax Post Office | Post Office | 230 | McLean | 40 34 02 N | 088 37 02 W |
| Colfax Post Office (historical) | Post Office | 244 | Warren | 40 38 53 N | 090 43 50 W |
| Colfax School (historical) | School | 243 | Warren | 40 38 54 N | 090 43 53 W |
| Colfax Townhall | Building | 210 | Champaign | 40 01 02 N | 088 24 23 W |
| Colgan School (historical) | School | 217 | Stark | 41 01 01 N | 089 39 29 W |
| Collater Channel | Canal | 176 | Cook | 41 50 06 N | 087 42 07 W |
| College Avenue Presbyterian Church | Church | 165 | Madison | 38 54 13 N | 090 08 49 W |
| College Avenue Presbyterian Church | Church | 224 | Mercer | 41 11 52 N | 090 44 60 W |
| College Cemetery | Cemetery | 210 | DuPage | 41 53 49 N | 087 56 56 W |
| College Center School (historical) | School | 222 | Iroquois | 40 31 56 N | 087 37 31 W |
| College Church In Wheaton | Church | 233 | DuPage | 41 52 04 N | 088 06 06 W |
| College Corner School (historical) | School | 201 | Iroquois | 40 54 24 N | 087 35 55 W |
| College Corner School (historical) | School | 190 | Iroquois | 40 53 21 N | 087 48 30 W |
| College Corner School (historical) | School | 206 | Morgan | 39 36 55 N | 090 00 26 W |
| College Corner School (historical) | School | 186 | Sangamon | 39 42 44 N | 089 45 43 W |
| College Corners | Locale | 213 | Vermilion | 40 23 42 N | 087 35 24 W |
| College Corners School (historical) | School | 213 | Vermilion | 40 23 41 N | 087 35 23 W |
| College Green Park | Park | 243 | Kane | 42 00 47 N | 088 20 32 W |
| College Grove School (historical) | School | 213 | Morgan | 39 37 32 N | 090 06 21 W |
| College Heights Baptist Church | Church | 128 | Saline | 37 49 20 N | 088 26 12 W |
| College Hill Cemetery | Cemetery | 158 | St. Clair | 38 36 40 N | 089 48 58 W |
| College Hill School | School | 182 | Cook | 42 02 43 N | 087 42 52 W |
| College Hill School (historical) | School | 201 | Montgomery | 39 09 06 N | 089 18 25 W |
| College Hill School (historical) | School | 206 | Vermilion | 40 21 43 N | 087 37 39 W |
| College Hills Mall Shopping Center | Locale | 252 | McLean | 40 30 27 N | 088 57 22 W |
| College Mall | Park | 212 | DuPage | 41 53 47 N | 087 56 50 W |
| College of Advanced Traffic | School | 182 | Cook | 41 52 56 N | 087 37 42 W |
| College of Automation | School | 179 | Cook | 41 52 40 N | 087 38 03 W |
| College of DuPage | School | 230 | DuPage | 41 50 31 N | 088 04 23 W |
| College of Lake County | School | 238 | Lake | 42 21 16 N | 088 00 47 W |
| College Park | Park | 243 | Kane | 42 01 16 N | 088 19 53 W |
| College Park | Park | 231 | McHenry | 42 20 50 N | 088 17 56 W |
| College Park | Park | 182 | Will | 41 30 23 N | 088 09 53 W |
| College Road Park | Park | 224 | DuPage | 41 45 06 N | 088 05 30 W |
| College School (historical) | School | 214 | Coles | 39 32 22 N | 087 58 50 W |
| College School (historical) | School | 174 | Jefferson | 38 27 46 N | 088 58 46 W |
| College School (historical) | School | 253 | Stephenson | 42 20 46 N | 089 25 37 W |
| College Square Park | Park | 247 | Henry | 41 18 07 N | 090 11 43 W |
| College Square Shopping Center | Locale | 230 | DuPage | 41 46 05 N | 088 05 58 W |
| College View Park | Park | 208 | Will | 41 36 53 N | 088 05 15 W |
| Collett School | School | 190 | Vermilion | 40 07 57 N | 087 36 53 W |
| Collett Street Church of Christ | Church | 179 | Vermilion | 40 07 44 N | 087 37 00 W |
| Collidge School (historical) | School | 256 | DeKalb | 41 57 51 N | 088 40 08 W |
| Collier Cemetery | Cemetery | 154 | Fayette | 38 48 46 N | 089 13 58 W |
| Collier Cemetery | Cemetery | 175 | Pope | 37 30 26 N | 088 27 14 W |
| Collier Creek | Stream | | Perry | 38 09 43 N | 089 08 51 W |
| Collier School (historical) | School | 184 | Monroe | 38 10 45 N | 090 05 30 W |
| Collins | Populated Place | 121 | Randolph | 38 01 15 N | 089 56 52 W |
| Collins (historical) | Populated Place | 195 | Kankakee | 41 03 54 N | 087 41 50 W |
| Collins Airstrip | Airport | 200 | Lee | 41 48 56 N | 089 36 27 W |
| Collins Cemetery | Cemetery | 143 | Clinton | 38 35 01 N | 089 17 59 W |
| Collins Cemetery | Cemetery | 135 | Lawrence | 38 38 45 N | 087 41 05 W |
| Collins Cemetery | Cemetery | 133 | Scott | 39 45 40 N | 090 35 30 W |
| Collins Cemetery | Cemetery | 253 | Union | 37 34 19 N | 089 20 06 W |
| Collins Cooling Pond | Reservoir | 170 | Grundy | 41 25 00 N | 088 25 00 W |
| Collins Dysant School (historical) | School | 249 | Lee | 41 48 56 N | 089 22 33 W |
| Collins Grove (historical) | Woods | 231 | Kendall | 41 29 06 N | 088 33 43 W |
| Collins High School | School | 180 | Cook | 41 51 51 N | 087 42 04 W |
| Collins Park | Park | 231 | Winnebago | 42 18 48 N | 089 04 55 W |
| Collins Pond Ditch | Canal | 137 | Pike | 39 33 30 N | 091 06 24 W |
| Collins Pond Slough | Lake | 137 | Pike | 39 34 01 N | 091 08 30 W |
| Collins Run | Stream | | Grundy | 41 25 20 N | 088 21 02 W |
| Collins School (historical) | School | 142 | Clinton | 38 35 26 N | 089 18 51 W |
| Collins School (historical) | School | 171 | Grundy | 41 24 58 N | 088 25 20 W |
| Collins School (historical) | School | 165 | Jasper | 39 06 49 N | 088 03 24 W |
| Collins School (historical) | School | 215 | Kendall | 41 40 19 N | 088 17 05 W |
| Collins School (historical) | School | 133 | Lawrence | 38 38 38 N | 087 41 04 W |
| Collins School (historical) | School | 262 | Marshall | 41 02 48 N | 089 35 26 W |
| Collins School (historical) | School | 171 | Pike | 39 39 06 N | 091 01 10 W |
| Collins South School | School | 188 | Cook | 41 42 49 N | 087 39 26 W |
| Collins Station Cooling Lake Dam | Dam | 170 | Grundy | 41 25 00 N | 088 25 00 W |
| Collinson Park | Park | 185 | Rock Island | 41 26 26 N | 090 33 39 W |
| Collinson School (historical) | School | 223 | Knox | 41 05 03 N | 090 04 50 W |
| Collinsville | Populated Place | 171 | Madison | 38 40 13 N | 089 59 04 W |
| Collinsville Church of God | Church | 164 | Madison | 38 40 52 N | 089 59 05 W |
| Collinsville City Hall | Building | 171 | Madison | 38 40 09 N | 089 59 10 W |
| Collinsville First Christian Church | Church | 168 | Madison | 38 41 18 N | 089 58 25 W |
| Collinsville Golf Course | Locale | 167 | Madison | 38 41 30 N | 089 58 50 W |
| Collinsville High School | School | 137 | St. Clair | 38 38 48 N | 090 00 43 W |
| Collinsville Holiday Inn Heliport | Airport | 128 | Madison | 38 40 48 N | 090 01 05 W |
| Collinsville Memorial Public Library | Building | 169 | Madison | 38 40 06 N | 089 59 25 W |
| Collinsville Post Office | Post Office | 171 | Madison | 38 40 10 N | 089 59 08 W |
| Collinsville United Methodist Church | Church | 170 | Madison | 38 40 07 N | 089 59 18 W |
| Collis Pond | Lake | 132 | Cass | 40 06 45 N | 090 21 05 W |
| Collison | Populated Place | 211 | Vermilion | 40 13 30 N | 087 48 14 W |
| Collison Airport | Airport | 214 | Vermilion | 40 14 05 N | 087 48 36 W |
| Collison Branch | Stream | | Vermilion | 40 14 07 N | 087 46 20 W |
| Collison Cemetery | Cemetery | 208 | Vermilion | 40 13 28 N | 087 47 56 W |
| Collison Post Office | Post Office | 211 | Vermilion | 40 13 29 N | 087 48 16 W |
| Collman School (historical) | School | 282 | Stephenson | 42 12 53 N | 089 31 54 W |
| Colmar | Populated Place | 167 | McDonough | 40 20 43 N | 090 53 28 W |
| Colmar Lake | Lake | 154 | McDonough | 40 20 38 N | 090 52 47 W |
| Colmar-Plymouth Oil Field | Oilfield | 155 | McDonough | 40 20 16 N | 090 51 36 W |
| Colmers Ferry (historical) | Locale | 127 | Clinton | 38 33 53 N | 089 23 10 W |
| Coloma School (historical) | School | 216 | Henderson | 40 50 37 N | 090 55 17 W |
| Coloma School (historical) | School | 204 | McDonough | 40 21 09 N | 090 32 37 W |
| Coloma Township-Rock Falls Public Library | Building | 197 | Whiteside | 41 46 18 N | 089 41 48 W |
| Colona | Populated Place | 184 | Henry | 41 29 02 N | 090 21 11 W |
| Colona Cemetery | Cemetery | 196 | Henry | 41 29 15 N | 090 20 56 W |
| Colona Grade School | School | 180 | Henry | 41 28 46 N | 090 21 24 W |
| Colonel Smith Memorial Airport | Airport | 190 | Macon | 39 59 15 N | 089 04 54 W |
| Colonial Acres Airport | Airport | 266 | DeKalb | 42 00 10 N | 088 38 45 W |