Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Canoe Creek | Stream | | Rock Island | 41 35 19 N | 090 11 07 W |
| Canteen Creek | Stream | | Madison | 38 39 58 N | 090 04 07 W |
| Canteen Lake | Lake | 122 | Madison | 38 40 12 N | 090 05 20 W |
| Canteen School | School | 127 | St. Clair | 38 39 31 N | 090 05 26 W |
| Canterbury Cemetery | Cemetery | 179 | Sangamon | 39 55 54 N | 089 41 17 W |
| Canterbury Elementary School | School | 274 | McHenry | 42 12 58 N | 088 19 13 W |
| Canterbury Park | Park | 274 | McHenry | 42 13 00 N | 088 19 09 W |
| Canterbury Place Retirement Home | Building | 238 | McHenry | 42 16 02 N | 088 16 48 W |
| Canterbury School | School | 189 | Cook | 41 35 33 N | 087 41 30 W |
| Canterbury Shopping Center | Locale | 187 | Cook | 41 35 56 N | 087 41 30 W |
| Cantighy Park | Park | 238 | DuPage | 41 51 19 N | 088 09 28 W |
| Cantigny Woods North | Woods | 202 | Cook | 41 45 48 N | 087 52 43 W |
| Cantigny Woods South | Woods | 204 | Cook | 41 45 32 N | 087 52 44 W |
| Canton | Populated Place | 197 | Fulton | 40 33 29 N | 090 02 06 W |
| Canton Assembly of God Church | Church | 206 | Fulton | 40 34 36 N | 090 01 53 W |
| Canton Church of Christ | Church | 198 | Fulton | 40 33 33 N | 090 01 59 W |
| Canton Chute | Channel | 143 | Adams | 40 04 36 N | 091 28 25 W |
| Canton Chute Public Use Area | Park | 145 | Adams | 39 59 09 N | 091 27 02 W |
| Canton City Lake | Reservoir | 174 | Fulton | 40 33 48 N | 089 58 24 W |
| Canton City Lake Dam | Dam | 174 | Fulton | 40 33 48 N | 089 58 23 W |
| Canton Country Club | Locale | 202 | Fulton | 40 35 03 N | 090 02 11 W |
| Canton Ferry | Locale | 144 | Adams | 40 08 04 N | 091 30 31 W |
| Canton High School | School | 202 | Fulton | 40 34 08 N | 090 02 03 W |
| Canton Industrial Park | Locale | 202 | Fulton | 40 33 33 N | 090 04 09 W |
| Canton Lake | Reservoir | 174 | Fulton | 40 33 48 N | 089 58 23 W |
| Canton Middle School | School | 250 | Cook | 42 01 33 N | 088 09 28 W |
| Canton Mine | Mine | 195 | Fulton | 40 32 01 N | 090 01 47 W |
| Canton Post Office | Post Office | 199 | Fulton | 40 33 19 N | 090 02 12 W |
| Canton Road Mine | Mine | 156 | Peoria | 40 33 51 N | 089 45 11 W |
| Cantrall | Populated Place | 181 | Sangamon | 39 56 16 N | 089 40 33 W |
| Cantrall Creek | Stream | | Sangamon | 39 53 32 N | 089 44 30 W |
| Cantrall Elementary School | School | 183 | Sangamon | 39 56 22 N | 089 40 29 W |
| Cantrell School (historical) | School | 159 | Hamilton | 37 56 10 N | 088 41 19 W |
| Cantway Slough | Gut | 189 | Kankakee | 41 09 37 N | 087 37 02 W |
| Canty Elementary School | School | 192 | Cook | 41 56 53 N | 087 49 48 W |
| Canyon Camp | Locale | 226 | Jo Daviess | 42 24 26 N | 090 07 39 W |
| Canyon Ridge (subdivision) | Populated Place | 251 | Winnebago | 42 11 50 N | 089 03 10 W |
| Canyon Ridge Camping Area | Locale | 261 | Jo Daviess | 42 26 59 N | 090 03 15 W |
| Cap Au Gris | Ridge | 205 | Calhoun | 38 59 29 N | 090 40 19 W |
| Cap Sauers Holdings Nature Preserve | Park | 204 | Cook | 41 40 46 N | 087 53 39 W |
| Capen Auditorium | Building | 243 | McLean | 40 30 36 N | 088 59 32 W |
| Capernaum Missionary Baptist Church | Church | 183 | Cook | 41 46 33 N | 087 40 10 W |
| Capital Airport | Airport | 179 | Sangamon | 39 50 37 N | 089 40 37 W |
| Capital City Shopping Center | Locale | 178 | Sangamon | 39 45 42 N | 089 36 36 W |
| Capitol Complex Visitors Center | Building | 182 | Sangamon | 39 47 51 N | 089 39 27 W |
| Capitol Oaks | Populated Place | 175 | St. Clair | 38 35 24 N | 089 58 06 W |
| Caplinger Cemetery | Cemetery | 138 | Williamson | 37 42 12 N | 088 52 40 W |
| Caplinger Pond | Swamp | 130 | Williamson | 37 42 14 N | 088 52 08 W |
| Capri School of Beauty Culture | School | 184 | Cook | 41 46 44 N | 087 41 26 W |
| Capri Village | Populated Place | 226 | Cook | 42 08 30 N | 088 01 47 W |
| Capri-Garfield Ridge School of Beauty Culture | School | 186 | Cook | 41 47 33 N | 087 46 54 W |
| Capron | Populated Place | 277 | Boone | 42 23 59 N | 088 44 25 W |
| Capron Cemetery | Cemetery | 283 | Boone | 42 23 39 N | 088 44 25 W |
| Capron Elementary School | School | 277 | Boone | 42 24 03 N | 088 44 48 W |
| Capsonic Group Heliport | Airport | 250 | Kane | 42 01 16 N | 088 19 23 W |
| Captain Dan Wright Forest Preserve | Park | 197 | Lake | 42 12 51 N | 087 55 35 W |
| Captain Vinyard Hollow | Valley | | Gallatin | 37 38 00 N | 088 20 33 W |
| Carber School (historical) | School | 233 | Bureau | 41 14 56 N | 089 43 22 W |
| Carbon | Populated Place | 167 | St. Clair | 38 35 38 N | 089 56 21 W |
| Carbon Cliff | Populated Place | 184 | Rock Island | 41 29 41 N | 090 23 26 W |
| Carbon Cliff United Methodist Church | Church | 176 | Rock Island | 41 29 43 N | 090 23 06 W |
| Carbon Cliff Village Hall | Building | 176 | Rock Island | 41 29 44 N | 090 23 10 W |
| Carbon High School (historical) | School | 237 | Mercer | 41 12 23 N | 090 39 16 W |
| Carbon Hill | Populated Place | 171 | Grundy | 41 17 49 N | 088 18 00 W |
| Carbon Lake | Lake | 110 | Jackson | 37 44 58 N | 089 20 22 W |
| Carbondale | Populated Place | 126 | Jackson | 37 43 38 N | 089 13 00 W |
| Carbondale City Hall | Building | 123 | Jackson | 37 43 39 N | 089 12 50 W |
| Carbondale Community High School Central Campus | School | 134 | Jackson | 37 43 40 N | 089 13 32 W |
| Carbondale Community High School East Campus | School | 125 | Jackson | 37 43 33 N | 089 11 17 W |
| Carbondale Post Office | Post Office | 132 | Jackson | 37 43 36 N | 089 13 08 W |
| Carbondale Public Library | Building | 134 | Jackson | 37 43 37 N | 089 13 14 W |
| Carbondale Reservoir | Reservoir | 129 | Jackson | 37 41 57 N | 089 13 23 W |
| Carbondale Reservoir Dam | Dam | 129 | Jackson | 37 41 57 N | 089 13 23 W |
| Carbough School (historical) | School | 204 | Lee | 41 40 55 N | 089 34 31 W |
| Cardenal Driving School | School | 182 | Cook | 41 54 10 N | 087 41 43 W |
| Cardenas Elementary School | School | 182 | Cook | 41 50 51 N | 087 42 54 W |
| Cardiff | Populated Place | 193 | Livingston | 41 03 06 N | 088 17 14 W |
| Cardinal Bernardin Cancer Center | Hospital | 190 | Cook | 41 51 27 N | 087 50 03 W |
| Cardinal Court | Populated Place | 242 | McLean | 40 31 02 N | 088 59 57 W |
| Cardinal Creek Golf Course | Locale | 137 | St. Clair | 38 33 13 N | 089 51 20 W |
| Cardinal Drive Church of Christ | Church | 217 | Cook | 42 05 10 N | 088 01 17 W |
| Cardinal School (historical) | School | 217 | Cook | 42 05 10 N | 088 01 17 W |
| Cardinal Stritch High School | School | 189 | Cook | 41 58 12 N | 087 46 27 W |
| Cards Grove School (historical) | School | 229 | Montgomery | 39 19 39 N | 089 11 46 W |
| Cardwell Cemetery | Cemetery | 138 | Saline | 37 53 16 N | 088 39 53 W |
| Career Academy | School | 181 | Cook | 41 52 35 N | 087 37 45 W |
| Carefree Park | Park | 212 | Cook | 42 03 37 N | 087 58 34 W |
| Carey Memorial Park | Park | 144 | La Salle | 41 20 29 N | 089 00 46 W |
| Carey School (historical) | School | 208 | Iroquois | 40 30 43 N | 087 47 00 W |
| Carey Temple African Methodist Episcopal Church | Church | 181 | Cook | 41 45 51 N | 087 35 52 W |
| Carey Tercentenary African Methodist Episcopal Church | Church | 181 | Cook | 41 51 40 N | 087 42 38 W |
| Carful School (historical) | School | 158 | Jefferson | 38 20 36 N | 089 04 18 W |
| Caribe Driving School | School | 183 | Cook | 41 55 01 N | 087 42 35 W |
| Cariens Cemetery | Cemetery | 138 | Wayne | 38 27 59 N | 088 30 17 W |
| Carl L Barton School | School | 155 | St. Clair | 38 25 14 N | 089 54 45 W |
| Carl L Schweinfurth Museum and Interpretive Center | Building | 164 | Jefferson | 38 19 58 N | 088 55 29 W |
| Carl Ritter Landing Strip | Airport | 165 | Rock Island | 41 20 16 N | 091 00 54 W |
| Carl Sandburg Birthplace Historic Site | Park | 238 | Knox | 40 56 12 N | 090 21 55 W |
| Carl Sandburg College | School | 233 | Knox | 40 58 54 N | 090 24 27 W |
| Carl Sandburg Elementary School | School | 208 | Coles | 39 28 42 N | 088 11 30 W |
| Carl Sandburg Elementary School | School | 236 | DuPage | 41 52 46 N | 088 07 33 W |
| Carl Sandburg High School | School | 220 | Cook | 41 38 55 N | 087 51 20 W |
| Carl Sandburg House | Building | 183 | Cook | 41 58 00 N | 087 40 23 W |
| Carl Sandburg Junior High School | School | 218 | Cook | 42 04 29 N | 088 00 49 W |
| Carl Sandburg Middle School | School | 232 | Lake | 42 16 09 N | 088 00 53 W |
| Carl Sandburg School | School | 204 | Cook | 42 07 55 N | 087 56 51 W |
| Carl Sandburg School | School | 195 | Will | 41 32 35 N | 088 08 07 W |
| Carl Sandburg Upper Elementary School | School | 266 | Stephenson | 42 17 23 N | 089 39 15 W |
| Carl Sandburg Village (subdivision) | Populated Place | 181 | Cook | 41 54 26 N | 087 37 56 W |
| Carl Street Studios | Building | 181 | Cook | 41 54 32 N | 087 38 03 W |