Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Silver Cross Missionary Baptist Church | Church | 183 | Cook | 41 49 01 N | 087 37 22 W |
| Silversmith Building | Building | 183 | Cook | 41 52 54 N | 087 37 35 W |
| Simon Peter Lutheran Church | Church | 183 | Cook | 41 54 34 N | 087 42 35 W |
| Simpson School (historical) | School | 183 | Montgomery | 39 05 51 N | 089 35 13 W |
| Sir M Davis Academy | School | 183 | Cook | 41 46 16 N | 087 40 06 W |
| Sisson Hall | Building | 183 | Peoria | 40 41 57 N | 089 36 54 W |
| Skokie Sports Park | Park | 183 | Cook | 42 01 33 N | 087 42 57 W |
| Slurry Impoundment Number 1 Dam | Dam | 183 | Christian | 39 35 06 N | 089 31 12 W |
| Slurry Impoundment Number 1 Reservoir | Reservoir | 183 | Christian | 39 35 06 N | 089 31 12 W |
| Smith Park | Park | 183 | Cook | 42 03 00 N | 087 41 36 W |
| Smith Park | Park | 183 | Cook | 41 53 32 N | 087 41 25 W |
| Smith School | School | 183 | Cook | 41 51 34 N | 087 43 18 W |
| Soloman School | School | 183 | Cook | 41 59 49 N | 087 43 28 W |
| South Brighton (subdivision) | Populated Place | 183 | Cook | 41 49 08 N | 087 41 08 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 Essex Cemetery | Cemetery | 183 | Kankakee | 41 10 37 N | 088 10 04 W |
| South Fork High School | School | 183 | Christian | 39 35 17 N | 089 24 44 W |
| South Fork Mauvaise Terre Cemetery | Cemetery | 183 | Morgan | 39 42 48 N | 090 11 29 W |
| South Holland | Populated Place | 183 | Cook | 41 36 03 N | 087 36 25 W |
| South Holland Post Office | Post Office | 183 | Cook | 41 35 58 N | 087 36 32 W |
| South Holland Public Libary | Building | 183 | Cook | 41 35 58 N | 087 36 37 W |
| South Loop Martketplace | Building | 183 | Cook | 41 51 59 N | 087 38 24 W |
| South Lynn (subdivision) | Populated Place | 183 | Cook | 41 46 32 N | 087 40 30 W |
| South Side Church of the Nazarene | Church | 183 | La Salle | 41 19 37 N | 088 50 11 W |
| Southern Missionary Baptist Church | Church | 183 | Cook | 41 46 23 N | 087 39 51 W |
| Southside School | School | 183 | Cook | 41 42 43 N | 087 45 16 W |
| Southside Tabernacle | Church | 183 | Cook | 41 45 11 N | 087 39 15 W |