Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Stone School (historical) | School | 115 | Hardin | 37 27 04 N | 088 20 41 W |
| Stone School (historical) | School | 203 | Henderson | 40 49 22 N | 090 57 08 W |
| Stone School (historical) | School | 273 | McHenry | 42 22 20 N | 088 41 30 W |
| Stone School (historical) | School | 250 | Ogle | 42 06 55 N | 089 20 20 W |
| Stone School (historical) | School | 219 | Whiteside | 41 51 29 N | 089 40 08 W |
| Stone School (historical) | School | 124 | Williamson | 37 44 24 N | 089 08 20 W |
| Stone Street School (historical) | School | 225 | Whiteside | 41 46 34 N | 090 09 49 W |
| Stonebraker School (historical) | School | 267 | Ogle | 42 04 17 N | 089 25 22 W |
| Stonehill School (historical) | School | 256 | Ogle | 41 59 26 N | 089 11 46 W |
| Stones Corner School (historical) | School | 274 | McHenry | 42 28 21 N | 088 22 29 W |
| Stoney Creek Elementary School | School | 182 | Cook | 41 40 47 N | 087 43 44 W |
| Stonington Elementary School | School | 188 | Christian | 39 38 24 N | 089 11 02 W |
| Stony Bluff School (historical) | School | 267 | Stephenson | 42 22 18 N | 089 47 37 W |
| Stony Point School (historical) | School | 216 | Mercer | 41 10 37 N | 090 40 12 W |
| Stony Point School (historical) | School | 182 | Pike | 39 39 08 N | 091 03 29 W |
| Stony Point School (historical) | School | 218 | Pike | 39 35 50 N | 090 55 13 W |
| Stony Point School (historical) | School | 144 | Pope | 37 22 11 N | 088 32 43 W |
| Stookey School | School | 164 | St. Clair | 38 29 54 N | 090 01 14 W |
| Stookey School (historical) | School | 177 | McDonough | 40 20 03 N | 090 49 52 W |
| Stormer School (historical) | School | 231 | Tazewell | 40 44 00 N | 089 21 31 W |
| Stott School (historical) | School | 218 | Lee | 41 44 36 N | 089 29 44 W |
| Stouts Grove School (historical) | School | 238 | McLean | 40 32 05 N | 089 12 34 W |
| Stowe Elementary School | School | 184 | Cook | 41 54 45 N | 087 42 47 W |
| Stowe School (historical) | School | 216 | Henry | 41 24 05 N | 090 08 39 W |
| Stowell School (historical) | School | 191 | Henry | 41 33 57 N | 089 55 05 W |
| Straight Row School (historical) | School | 185 | Logan | 40 11 12 N | 089 16 25 W |
| Strassburg Elementary School | School | 201 | Cook | 41 29 02 N | 087 33 58 W |
| Stratford Junior High School | School | 240 | DuPage | 41 56 33 N | 088 06 22 W |
| Stratford School | School | 199 | Lake | 42 09 58 N | 087 49 12 W |
| Straw School (historical) | School | 294 | Carroll | 42 09 42 N | 089 46 09 W |