Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Community Christian Church | Church | 197 | Jersey | 39 07 14 N | 090 19 30 W |
| Community Christian Church | Church | 202 | Lake | 42 11 19 N | 087 54 25 W |
| Community Christian Church | Church | 212 | Rock Island | 41 30 01 N | 090 28 51 W |
| Community Christian School | School | 191 | Whiteside | 41 51 56 N | 090 09 21 W |
| Community Church | Church | 209 | Bureau | 41 25 38 N | 089 35 15 W |
| Community Church | Church | 215 | DuPage | 41 43 48 N | 087 58 47 W |
| Community Church | Church | 138 | Franklin | 37 56 46 N | 088 57 40 W |
| Community Church | Church | 241 | Henry | 41 11 59 N | 090 06 53 W |
| Community Church | Church | 147 | Jefferson | 38 20 35 N | 088 55 12 W |
| Community Church | Church | 206 | Lee | 41 49 59 N | 089 32 07 W |
| Community Church | Church | 252 | Ogle | 41 54 12 N | 089 32 28 W |
| Community Church of Barrington | Church | 257 | Cook | 42 09 04 N | 088 07 59 W |
| Community Church of Brookfield | Church | 190 | Cook | 41 48 52 N | 087 51 21 W |
| Community Church of Christ | Church | 195 | Whiteside | 41 45 47 N | 089 42 03 W |
| Community Church of God | Church | 188 | Cook | 41 44 22 N | 087 47 26 W |
| Community Church of God | Church | 136 | St. Clair | 38 35 43 N | 089 48 15 W |
| Community Church of Rolling Meadows | Church | 218 | Cook | 42 04 42 N | 088 00 58 W |
| Community Church of the Nazarene | Church | 197 | Rock Island | 41 29 59 N | 090 28 24 W |
| Community Congregational Church | Church | 214 | DuPage | 41 52 55 N | 087 58 40 W |
| Community Congregational Church | Church | 262 | Kane | 41 53 37 N | 088 28 19 W |
| Community Driving School | School | 190 | Cook | 41 58 25 N | 087 51 46 W |
| Community Economic Development Association | Building | 185 | Cook | 41 38 25 N | 087 42 24 W |
| Community Faith Baptist Church | Church | 183 | Cook | 41 45 03 N | 087 39 06 W |
| Community Full Gospel Church | Church | 182 | Cook | 41 56 10 N | 087 40 34 W |
| Community General Hospital | Hospital | 205 | Whiteside | 41 48 08 N | 089 41 50 W |
| Community Gospel Center | Church | 182 | Cook | 41 56 28 N | 087 42 18 W |
| Community Gospel Church | Church | 192 | Cook | 41 54 30 N | 087 51 19 W |
| Community Hospital | Hospital | 220 | Kane | 41 53 00 N | 088 18 30 W |
| Community Hospital of Ottawa | Hospital | 147 | La Salle | 41 21 28 N | 088 49 27 W |
| Community Hospital of Ottawa Heliport | Airport | 147 | La Salle | 41 21 26 N | 088 49 30 W |
| Community Life Church | Church | 199 | Will | 41 35 10 N | 088 03 18 W |
| Community Lutheran Church | Church | 187 | Cook | 41 53 33 N | 087 45 45 W |
| Community Lutheran School | School | 187 | Cook | 41 53 33 N | 087 45 45 W |
| Community Memorial Hospital | Hospital | 189 | Macoupin | 39 00 56 N | 089 47 22 W |
| Community Memorial Hospital | Hospital | 230 | Warren | 40 55 20 N | 090 39 29 W |
| Community Memorial Hospital Heliport | Airport | 182 | Macoupin | 39 00 47 N | 089 47 20 W |
| Community Memorial Hospital Heliport | Airport | 231 | Warren | 40 55 18 N | 090 39 19 W |
| Community Mennonite Church | Church | 188 | Cook | 41 35 42 N | 087 41 41 W |
| Community Methodist Cemetery | Cemetery | 243 | DeKalb | 41 50 10 N | 088 37 15 W |
| Community Missionary Baptist Church | Church | 182 | Cook | 41 51 14 N | 087 42 32 W |
| Community Park | Park | 190 | Cook | 42 04 33 N | 087 44 15 W |
| Community Park | Park | 229 | Cook | 42 06 44 N | 088 02 09 W |
| Community Park | Park | 205 | Cook | 41 34 24 N | 087 43 20 W |
| Community Park | Park | 257 | DeKalb | 41 59 00 N | 088 40 20 W |
| Community Park | Park | 229 | DuPage | 41 53 28 N | 088 05 43 W |
| Community Park | Park | 203 | DuPage | 41 47 25 N | 088 04 53 W |
| Community Park | Park | 204 | DuPage | 41 56 06 N | 087 59 00 W |
| Community Park | Park | 190 | Greene | 39 27 57 N | 090 21 52 W |
| Community Park | Park | 198 | Hancock | 40 16 56 N | 090 55 16 W |
| Community Park | Park | 239 | Lake | 42 17 13 N | 088 00 51 W |
| Community Presbyterian Church | Church | 182 | Cook | 41 35 44 N | 087 31 59 W |
| Community Presbyterian Church | Church | 191 | Cook | 41 51 49 N | 087 51 25 W |
| Community Presbyterian Church | Church | 225 | DuPage | 41 48 00 N | 087 57 16 W |
| Community Presbyterian Church | Church | 217 | DuPage | 41 52 28 N | 087 59 25 W |
| Community Protestant Church | Church | 232 | Lake | 42 16 13 N | 088 00 31 W |
| Community United Church of Christ | Church | 189 | Carroll | 42 05 29 N | 090 09 01 W |
| Community United Methodist Church | Church | 182 | Cook | 41 48 12 N | 087 40 16 W |
| Community Vinegard Missionary Baptist Church | Church | 183 | Cook | 41 46 25 N | 087 40 11 W |
| Como | Populated Place | 192 | Whiteside | 41 45 59 N | 089 46 01 W |
| Como Cemetery | Cemetery | 192 | Whiteside | 41 46 26 N | 089 46 06 W |
| Compass Rose Airport | Airport | 289 | Boone | 42 27 20 N | 088 54 10 W |
| Compro | Populated Place | 195 | Sangamon | 39 35 23 N | 089 46 57 W |
| Compromise Post Office (historical) | Post Office | 228 | Champaign | 40 13 32 N | 087 57 37 W |
| Compromise School (historical) | School | 162 | Jasper | 39 03 42 N | 088 03 22 W |
| Compton | Populated Place | 295 | Lee | 41 41 40 N | 089 04 52 W |
| Compton Cemetery | Cemetery | 183 | Pope | 37 21 00 N | 088 32 34 W |
| Compton Election Precinct | Civil | 119 | Wabash | 38 18 41 N | 087 56 17 W |
| Compton Park | Park | 207 | McDonough | 40 27 13 N | 090 39 50 W |
| Compton School (historical) | School | 197 | Christian | 39 21 50 N | 089 20 09 W |
| Compton School (historical) | School | 228 | Whiteside | 41 55 01 N | 089 42 22 W |
| Compton United Methodist Church | Church | 296 | Lee | 41 41 40 N | 089 04 59 W |
| Computer Learning Center of Chicago | School | 180 | Cook | 41 53 36 N | 087 37 20 W |
| Comstock Hall | Building | 183 | Peoria | 40 41 46 N | 089 36 59 W |
| Conant | Populated Place | 141 | Perry | 38 03 21 N | 089 28 56 W |
| Conant Cemetery | Cemetery | 155 | Marion | 38 47 19 N | 089 00 22 W |
| Conant High School | School | 229 | Cook | 42 02 11 N | 088 03 46 W |
| Conard School (historical) | Locale | 206 | La Salle | 41 07 18 N | 088 36 18 W |
| Conard School (historical) | School | 233 | Warren | 40 56 01 N | 090 27 36 W |
| Conaway Lake | Lake | 105 | Union | 37 28 27 N | 089 26 54 W |
| Concord | Populated Place | 181 | Morgan | 39 49 00 N | 090 22 22 W |
| Concord Baptist Cemetery | Cemetery | 146 | Washington | 38 13 20 N | 089 22 34 W |
| Concord Baptist Church | Church | 180 | Cook | 41 46 57 N | 087 35 39 W |
| Concord Cemetery | Cemetery | 211 | Adams | 39 56 57 N | 091 00 38 W |
| Concord Cemetery | Cemetery | 195 | Cumberland | 39 21 27 N | 088 28 13 W |
| Concord Cemetery | Cemetery | 158 | Johnson | 37 26 21 N | 088 48 21 W |
| Concord Cemetery | Cemetery | 174 | Menard | 40 03 18 N | 089 52 54 W |
| Concord Cemetery | Cemetery | 180 | Morgan | 39 48 55 N | 090 23 13 W |
| Concord Cemetery | Cemetery | 219 | Peoria | 40 38 49 N | 089 58 21 W |
| Concord Cemetery | Cemetery | 156 | Perry | 38 12 00 N | 089 23 10 W |
| Concord Cemetery | Cemetery | 167 | Pope | 37 31 47 N | 088 29 02 W |
| Concord Cemetery | Cemetery | 158 | Pope | 37 31 48 N | 088 28 58 W |
| Concord Cemetery | Cemetery | 141 | Pulaski | 37 12 33 N | 089 07 09 W |
| Concord Christian Church | Church | 180 | Morgan | 39 48 53 N | 090 22 14 W |
| Concord Church | Church | 134 | Hamilton | 38 05 20 N | 088 27 36 W |
| Concord Church | Church | 133 | Johnson | 37 25 11 N | 088 48 07 W |
| Concord Church | Church | 192 | Macoupin | 39 23 27 N | 089 56 52 W |
| Concord Church | Church | 168 | Pope | 37 31 46 N | 088 29 03 W |
| Concord Church | Church | 116 | White | 38 13 39 N | 088 08 23 W |
| Concord Church (historical) | Church | 194 | Cumberland | 39 21 28 N | 088 28 12 W |
| Concord Church (historical) | Church | 220 | Peoria | 40 38 53 N | 089 58 04 W |
| Concord Creek | Stream | | Menard | 40 04 40 N | 089 49 34 W |
| Concord Election Precinct | Civil | 177 | Morgan | 39 49 54 N | 090 22 04 W |
| Concord Elementary School | School | 220 | DuPage | 41 44 30 N | 087 58 13 W |
| Concord Oil Field | Oilfield | 113 | White | 38 00 44 N | 088 05 31 W |
| Concord Park | Park | 237 | Kane | 41 59 19 N | 088 18 28 W |
| Concord Presbyterian Church | Church | 210 | Monroe | 38 21 17 N | 090 09 12 W |
| Concord Reservoir | Reservoir | 168 | Morgan | 39 48 23 N | 090 20 37 W |
| Concord Reservoir Dam | Dam | 168 | Morgan | 39 48 23 N | 090 20 37 W |
| Concord School (historical) | School | 163 | Bond | 38 53 30 N | 089 16 31 W |
| Concord School (historical) | School | 185 | Clark | 39 18 24 N | 087 55 10 W |