Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| South Burlington School (historical) | School | 268 | Kane | 41 59 00 N | 088 34 36 W |
| South Cady Cemetery | Cemetery | 171 | Schuyler | 40 08 27 N | 090 47 18 W |
| South Campground | Locale | 135 | Fulton | 40 11 39 N | 090 12 13 W |
| South Cemetery | Cemetery | 223 | Kane | 41 54 32 N | 088 18 07 W |
| South Cemetery | Cemetery | 222 | McDonough | 40 33 21 N | 090 51 58 W |
| South Center Shopping Center | Locale | 206 | Kane | 41 43 33 N | 088 19 21 W |
| South Central Church of Christ | Church | 184 | Cook | 41 49 21 N | 087 36 34 W |
| South Central Elementary School-Farina | School | 176 | Fayette | 38 50 03 N | 088 46 23 W |
| South Central Elementary School-Kinmundy | School | 184 | Marion | 38 46 27 N | 088 50 15 W |
| South Central High School | School | 175 | Fayette | 38 50 27 N | 088 46 41 W |
| South Central Middle School | School | 184 | Marion | 38 46 05 N | 088 50 57 W |
| South Central School (historical) | School | 207 | Lee | 41 50 23 N | 089 28 57 W |
| South Chicago | Populated Place | 180 | Cook | 41 43 22 N | 087 32 11 W |
| South Chicago Community Hospital | Hospital | 183 | Cook | 41 43 36 N | 087 34 00 W |
| South Chicago Community Hospital Nursing School | School | 183 | Cook | 41 43 36 N | 087 34 00 W |
| South Chicago Community Hospital Respiratory Therapist School | School | 183 | Cook | 41 43 36 N | 087 34 00 W |
| South Chicago Community Hospital X-Ray Technicans School | School | 183 | Cook | 41 43 36 N | 087 34 00 W |
| South Chicago Heights | Populated Place | 218 | Cook | 41 28 51 N | 087 38 16 W |
| South Chicago Heights (subdivision) | Populated Place | 180 | Cook | 41 43 36 N | 087 33 45 W |
| South Chicago Station | Locale | 180 | Cook | 41 43 32 N | 087 32 52 W |
| South Church (historical) | Church | 227 | Livingston | 40 40 48 N | 088 28 02 W |
| South City Park | Park | 226 | Ford | 40 27 28 N | 088 22 21 W |
| South Clyde School (historical) | School | 221 | Whiteside | 41 52 23 N | 089 56 42 W |
| South College School (historical) | School | 165 | Scott | 39 37 21 N | 090 29 40 W |
| South Commons (subdivision) | Populated Place | 181 | Cook | 41 50 33 N | 087 37 19 W |
| South Community Church | Church | 202 | Cook | 42 03 25 N | 087 56 05 W |
| South Cotton Hill School (historical) | School | 175 | Sangamon | 39 40 11 N | 089 35 01 W |
| South County Line Cemetery | Cemetery | 143 | Jackson | 37 40 29 N | 089 09 13 W |
| South County Line Christian Church | Church | 143 | Jackson | 37 40 29 N | 089 09 11 W |
| South Crest (subdivision) | Populated Place | 189 | Adams | 39 53 53 N | 091 23 23 W |
| South Dam on Salt Creek | Dam | 210 | Cook | 42 01 00 N | 088 00 06 W |
| South Danville | Populated Place | 195 | Vermilion | 40 06 54 N | 087 38 15 W |
| South Deering | Populated Place | 179 | Cook | 41 41 32 N | 087 33 30 W |
| South Deering United Methodist Church | Church | 179 | Cook | 41 42 11 N | 087 33 48 W |
| South Division High School (historical) | School | 182 | Cook | 41 50 43 N | 087 37 32 W |
| South Downs School (historical) | School | 242 | McLean | 40 17 48 N | 088 51 45 W |
| South Dunham Cemetery | Cemetery | 268 | McHenry | 42 20 32 N | 088 37 05 W |
| South Dunham School (historical) | School | 274 | McHenry | 42 20 31 N | 088 36 46 W |
| South Edgewater (subdivision) | Populated Place | 182 | Cook | 41 58 20 N | 087 39 34 W |
| South Edwards River | Stream | | Henry | 41 15 56 N | 090 15 41 W |
| South Elementary School | School | 189 | Christian | 39 32 31 N | 089 18 28 W |
| South Elementary School | School | 190 | Clark | 39 23 02 N | 087 41 35 W |
| South Elementary School | School | 194 | Cook | 41 55 22 N | 087 52 09 W |
| South Elementary School | School | 195 | Cook | 42 01 12 N | 087 53 10 W |
| South Elementary School | School | 203 | Cook | 42 07 27 N | 087 45 04 W |
| South Elementary School | School | 208 | Lake | 42 19 01 N | 087 51 15 W |
| South Elementary School | School | 189 | Macoupin | 39 16 41 N | 089 52 55 W |
| South Elementary School | School | 275 | McHenry | 42 13 40 N | 088 20 30 W |
| South Elementary School | School | 156 | Peoria | 40 54 46 N | 089 29 39 W |
| South Elementary School | School | 128 | Wabash | 38 24 15 N | 087 46 10 W |
| South Elgin | Populated Place | 216 | Kane | 41 59 39 N | 088 17 32 W |
| South Elgin Community United Church | Church | 229 | Kane | 41 59 43 N | 088 18 02 W |
| South Elgin Post Office | Post Office | 226 | Kane | 41 59 45 N | 088 17 25 W |
| South Elkhorn | Populated Place | 250 | Carroll | 41 58 00 N | 089 42 44 W |
| South Elkhorn Methodist Cemetery | Cemetery | 252 | Carroll | 41 58 02 N | 089 42 45 W |
| South Elmhurst | Populated Place | 204 | DuPage | 41 52 55 N | 087 56 24 W |
| South End Park | Park | 221 | Kane | 42 05 20 N | 088 16 43 W |
| South Englewood (subdivision) | Populated Place | 184 | Cook | 41 44 48 N | 087 39 43 W |
| South Essex Cemetery | Cemetery | 183 | Kankakee | 41 10 37 N | 088 10 04 W |
| South Evanston | Populated Place | 187 | Cook | 42 02 14 N | 087 40 50 W |
| South Flannigan Townhall | Building | 144 | Hamilton | 37 56 09 N | 088 38 55 W |
| South Flint School (historical) | School | 191 | Pike | 39 40 43 N | 090 39 45 W |
| South Fork Apple River | Stream | | Jo Daviess | 42 26 52 N | 090 03 16 W |
| South Fork Bear Creek | Stream | | Adams | 40 10 09 N | 091 17 43 W |
| South Fork Brouilletts Creek | Stream | | Edgar | 39 43 32 N | 087 38 38 W |
| South Fork Camp Creek | Stream | | Champaign | 40 07 39 N | 088 25 39 W |
| South Fork Cemetery | Cemetery | 178 | Sangamon | 39 41 56 N | 089 30 10 W |
| South Fork Church | Church | 177 | Sangamon | 39 41 55 N | 089 30 07 W |
| South Fork Coal Creek | Stream | | Fulton | 40 40 22 N | 090 09 51 W |
| South Fork Creek | Stream | | Adams | 40 10 28 N | 090 53 41 W |
| South Fork Deer Creek | Stream | | Wayne | 38 29 08 N | 088 25 37 W |
| South Fork Ditch | Canal | 192 | Whiteside | 41 40 33 N | 089 42 43 W |
| South Fork High School | School | 183 | Christian | 39 35 17 N | 089 24 44 W |
| South Fork Horse Creek | Stream | | Monroe | 38 10 57 N | 090 03 25 W |
| South Fork Indian Creek | Stream | | Coles | 39 25 07 N | 088 12 33 W |
| South Fork Kaskaskia River | Stream | | Fayette | 39 06 25 N | 088 58 38 W |
| South Fork Kent Creek | Stream | | Winnebago | 42 15 56 N | 089 06 08 W |
| South Fork Lake Fork | Stream | | Logan | 39 56 11 N | 089 14 03 W |
| South Fork Lick Creek | Stream | | Sangamon | 39 39 32 N | 089 49 04 W |
| South Fork Mauvaise Terre Cemetery | Cemetery | 183 | Morgan | 39 42 48 N | 090 11 29 W |
| South Fork McKee Creek | Stream | | Pike | 39 46 41 N | 090 37 14 W |
| South Fork Mud Creek | Stream | | Washington | 38 15 49 N | 089 38 42 W |
| South Fork Otter Creek | Stream | | Jersey | 39 03 30 N | 090 27 37 W |
| South Fork Raccoon Creek | Stream | | Crawford | 39 09 44 N | 087 41 58 W |
| South Fork Saline River | Stream | | Saline | 37 41 46 N | 088 27 18 W |
| South Fork Sangamon River | Stream | | Sangamon | 39 48 50 N | 089 32 28 W |
| South Fork School (historical) | School | 188 | Sangamon | 39 37 38 N | 089 50 30 W |
| South Fork Shaw Creek | Stream | | Fulton | 40 30 52 N | 090 22 32 W |
| South Fork Shelby Creek | Stream | | Brown | 40 02 56 N | 090 41 19 W |
| South Fork South Branch Chicago River | Stream | | Cook | 41 50 39 N | 087 39 51 W |
| South Fork South Henderson Creek | Stream | | Henderson | 40 49 52 N | 090 49 24 W |
| South Fork United Methodist Church | Church | 201 | Christian | 39 21 50 N | 089 15 54 W |
| South Fork Vermilion River | Stream | | Livingston | 40 49 11 N | 088 30 29 W |
| South Freedom Church | Church | 135 | Richland | 38 38 39 N | 088 15 04 W |
| South Freeport | Populated Place | 254 | Stephenson | 42 14 27 N | 089 34 21 W |
| South Fritz Island | Island | 139 | Pike | 39 31 00 N | 091 04 45 W |
| South Fulton Cemetery | Cemetery | 186 | Fulton | 40 11 44 N | 090 21 28 W |
| South Grand Avenue Interchange | Crossing | 180 | Sangamon | 39 47 11 N | 089 35 57 W |
| South Grove Cemetery | Cemetery | 262 | DeKalb | 42 02 09 N | 088 51 34 W |
| South Grove Park | Park | 231 | DuPage | 41 44 01 N | 088 01 14 W |
| South Grove Post Office (historical) | Post Office | 262 | DeKalb | 42 02 07 N | 088 51 36 W |
| South Grove School (historical) | School | 262 | DeKalb | 42 02 07 N | 088 51 34 W |
| South Grove School (historical) | School | 196 | Knox | 40 43 44 N | 090 18 36 W |
| South Hall | Building | 211 | Kane | 41 45 14 N | 088 20 57 W |
| South Hall | Building | 198 | Will | 41 36 10 N | 088 04 58 W |
| South Harvey | Populated Place | 187 | Cook | 41 34 57 N | 087 39 47 W |
| South Heater School (historical) | School | 160 | Mason | 40 16 32 N | 089 54 48 W |
| South Hebron Cemetery | Cemetery | 273 | McHenry | 42 25 45 N | 088 23 38 W |
| South Henderson Cemetery | Cemetery | 207 | Henderson | 40 52 20 N | 090 54 45 W |
| South Henderson Church | Church | 204 | Henderson | 40 52 23 N | 090 54 51 W |