Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| State University Farm | Locale | 253 | McLean | 40 31 17 N | 089 00 50 W |
| State Women Department Mission of the Family Prayer Band Churches | Church | 182 | Cook | 41 48 36 N | 087 36 34 W |
| State-Lake Theater (historical) | Building | 182 | Cook | 41 53 07 N | 087 37 42 W |
| State-Madison Building | Building | 182 | Cook | 41 52 56 N | 087 37 43 W |
| Stateville Correctional Center | Locale | 196 | Will | 41 34 43 N | 088 05 37 W |
| Stateway Gardens (subdivision) | Populated Place | 182 | Cook | 41 49 47 N | 087 37 40 W |
| Station Golf Links of Glenview | Locale | 196 | Cook | 42 04 54 N | 087 49 46 W |
| Station Number 10 | Locale | 227 | Henry | 41 23 30 N | 090 10 05 W |
| Statler Cemetery | Cemetery | 201 | Marshall | 41 04 02 N | 089 13 18 W |
| Statler School (historical) | School | 201 | Marshall | 41 04 00 N | 089 12 59 W |
| Staton Airport | Airport | 236 | Lee | 41 51 15 N | 089 05 15 W |
| Staude Cemetery | Cemetery | 134 | Washington | 38 25 40 N | 089 31 35 W |
| Stauffer School (historical) | School | 207 | Bureau | 41 13 18 N | 089 29 10 W |
| Staunton | Populated Place | 189 | Macoupin | 39 00 44 N | 089 47 28 W |
| Staunton City Hall | Building | 189 | Macoupin | 39 00 42 N | 089 47 23 W |
| Staunton Coal Company Reservoir | Reservoir | 174 | Madison | 38 55 42 N | 089 43 24 W |
| Staunton Coal Company Reservoir Dam | Dam | 174 | Madison | 38 55 42 N | 089 43 24 W |
| Staunton Country Club | Locale | 183 | Macoupin | 39 02 37 N | 089 48 37 W |
| Staunton Country Club Lake | Reservoir | 181 | Macoupin | 39 02 42 N | 089 48 36 W |
| Staunton Country Club Lake Dam | Dam | 181 | Macoupin | 39 02 42 N | 089 48 36 W |
| Staunton High School | School | 189 | Macoupin | 39 01 04 N | 089 47 43 W |
| Staunton Post Office | Post Office | 189 | Macoupin | 39 00 42 N | 089 47 25 W |
| Staunton Reservoir | Reservoir | 179 | Macoupin | 39 02 33 N | 089 46 52 W |
| Staunton Reservoir Dam | Dam | 179 | Macoupin | 39 02 33 N | 089 46 52 W |
| Staunton West Oil Field | Oilfield | 193 | Macoupin | 39 03 05 N | 089 52 58 W |
| Stavanger | Populated Place | 206 | La Salle | 41 23 55 N | 088 36 50 W |
| Stavanger Lutheran Cemetery | Cemetery | 198 | La Salle | 41 23 02 N | 088 35 41 W |
| Stavanger Lutheran Church | Church | 206 | La Salle | 41 23 54 N | 088 36 44 W |
| Steamboat Hill Campground | Locale | 161 | Pope | 37 22 37 N | 088 29 05 W |
| Stearns Cemetery | Cemetery | 209 | Champaign | 40 09 42 N | 087 58 42 W |
| Stearns Cemetery | Cemetery | 179 | Jackson | 37 39 20 N | 089 14 49 W |
| Stearns Cemetery | Cemetery | 192 | Jackson | 37 36 58 N | 089 21 04 W |
| Stearns Cemetery | Cemetery | 195 | Vermilion | 40 07 35 N | 087 51 37 W |
| Stearns Hollow | Valley | | Calhoun | 39 21 03 N | 090 45 35 W |
| Stearns Landing Strip | Airport | 283 | Stephenson | 42 26 43 N | 089 31 36 W |
| Stebbins Cemetery | Cemetery | 208 | La Salle | 41 20 50 N | 088 38 43 W |
| Stebler Hall | Building | 182 | Cook | 42 00 04 N | 087 39 33 W |
| Steel and Glass House | Building | 182 | Cook | 41 55 04 N | 087 38 36 W |
| Steel City | Populated Place | 132 | Franklin | 37 59 53 N | 088 52 45 W |
| Steel Supply Heliport | Airport | 214 | Cook | 42 03 31 N | 088 01 03 W |
| Steele | Populated Place | 210 | Will | 41 30 21 N | 087 57 44 W |
| Steele Cemetery | Cemetery | 189 | Schuyler | 40 09 35 N | 090 24 56 W |
| Steele School | School | 232 | Knox | 40 56 48 N | 090 23 39 W |
| Steele School (historical) | School | 136 | Randolph | 37 58 40 N | 089 39 30 W |
| Steeleville | Populated Place | 126 | Randolph | 38 00 26 N | 089 39 30 W |
| Steeleville Election Precinct | Civil | 137 | Randolph | 38 00 49 N | 089 40 12 W |
| Steeleville Elementary School | School | 132 | Randolph | 38 00 10 N | 089 39 33 W |
| Steeleville High School | School | 131 | Randolph | 38 00 02 N | 089 39 37 W |
| Steeleville Precinct | Civil | 127 | Randolph | 38 01 00 N | 089 39 00 W |
| Steeleville United Methodist Church | Church | 130 | Randolph | 38 00 20 N | 089 39 45 W |
| Steelton | Populated Place | 204 | Vermilion | 40 00 34 N | 087 40 44 W |
| Steenberger Cemetery | Cemetery | 194 | Logan | 39 57 40 N | 089 18 47 W |
| Steeple Run Elementary School | School | 222 | DuPage | 41 46 56 N | 088 06 14 W |
| Steer Creek | Stream | | Macoupin | 39 20 15 N | 090 05 54 W |
| Steger | Populated Place | 217 | Cook | 41 28 12 N | 087 38 11 W |
| Steger Village Hall | Building | 217 | Cook | 41 28 13 N | 087 38 17 W |
| Steging Cemetery | Cemetery | 152 | Mason | 40 16 12 N | 089 59 22 W |
| Stehman School Playground | Park | 181 | Cook | 41 56 04 N | 087 42 30 W |
| Steidley Branch | Stream | | Macoupin | 39 21 40 N | 090 05 08 W |
| Stein Cemetery | Cemetery | 178 | Fayette | 38 58 30 N | 088 50 58 W |
| Stein School | School | 160 | Grundy | 41 20 09 N | 088 24 08 W |
| Stein-Nagel Cemetery | Cemetery | 145 | St. Clair | 38 26 52 N | 090 00 17 W |
| Steindler School | School | 179 | Cook | 41 44 13 N | 087 34 39 W |
| Steiner Lake | Reservoir | 139 | Wayne | 38 23 44 N | 088 19 35 W |
| Steinkoenig School (historical) | School | 155 | Madison | 38 45 26 N | 089 44 43 W |
| Steinmetz High School | School | 195 | Cook | 41 56 08 N | 087 47 05 W |
| Stelle | Populated Place | 214 | Ford | 40 57 00 N | 088 09 12 W |
| Stem School (historical) | School | 226 | Warren | 40 43 56 N | 090 38 09 W |
| Stemler Cave Woods Nature Preserve | Park | 195 | St. Clair | 38 27 36 N | 090 09 24 W |
| Step School | School | 179 | Cook | 41 46 20 N | 087 34 00 W |
| Stephanie Lake | Lake | 255 | Cook | 42 08 16 N | 088 08 38 W |
| Stephen A Forbes State Park | Park | 168 | Marion | 38 43 47 N | 088 46 08 W |
| Stephen Decatur High School | School | 203 | Macon | 39 53 11 N | 088 56 33 W |
| Stephen Mack School | School | 230 | Winnebago | 42 27 15 N | 089 03 20 W |
| Stephen Mather House | Building | 180 | Cook | 41 47 33 N | 087 35 31 W |
| Stephen's Cemetery | Cemetery | 170 | Logan | 40 12 04 N | 089 34 54 W |
| Stephens Cemetery | Cemetery | 201 | Edgar | 39 30 29 N | 087 45 48 W |
| Stephens Cemetery | Cemetery | 149 | Jefferson | 38 11 50 N | 089 05 41 W |
| Stephens Cemetery | Cemetery | 169 | Schuyler | 40 02 18 N | 090 33 53 W |
| Stephens Hall of Science | Building | 210 | Kane | 41 45 16 N | 088 20 49 W |
| Stephens Park | Park | 210 | Rock Island | 41 29 58 N | 090 31 43 W |
| Stephens School (historical) | School | 198 | Kendall | 41 28 20 N | 088 34 09 W |
| Stephens School (historical) | School | 119 | White | 38 06 41 N | 088 21 33 W |
| Stephenson Cemetery | Cemetery | 182 | Cass | 39 53 00 N | 090 11 49 W |
| Stephenson County | Civil | 238 | Stephenson | 42 21 00 N | 089 40 00 W |
| Stephenson County Courthouse | Building | 240 | Stephenson | 42 17 53 N | 089 37 18 W |
| Stephenson County Fairgrounds | Park | 239 | Stephenson | 42 16 10 N | 089 37 23 W |
| Stephenson County Historical Museum | Building | 262 | Stephenson | 42 17 04 N | 089 36 54 W |
| Stephenson County Jail | Building | 241 | Stephenson | 42 17 53 N | 089 37 21 W |
| Stephenson School (historical) | School | 182 | Grundy | 41 26 37 N | 088 27 45 W |
| Stephenson School (historical) | School | 209 | Livingston | 41 00 25 N | 088 27 16 W |
| Steppig Lake | Lake | 137 | Monroe | 38 25 14 N | 090 13 32 W |
| Sterling | Populated Place | 201 | Whiteside | 41 47 19 N | 089 41 46 W |
| Sterling Bazaar Shopping Center | Locale | 191 | Peoria | 40 43 33 N | 089 37 57 W |
| Sterling City Hall | Building | 202 | Whiteside | 41 47 19 N | 089 41 29 W |
| Sterling High School | School | 208 | Whiteside | 41 48 10 N | 089 41 28 W |
| Sterling Lake | Lake | 204 | Lake | 42 28 30 N | 087 56 26 W |
| Sterling Lake Forest Preserve | Park | 204 | Lake | 42 27 04 N | 087 56 15 W |
| Sterling Middle School | School | 188 | Peoria | 40 42 56 N | 089 37 57 W |
| Sterling Place | Populated Place | 128 | St. Clair | 38 37 35 N | 090 02 23 W |
| Sterling Pond | Lake | | DuPage | 41 48 53 N | 088 05 12 W |
| Sterling Post Office | Post Office | 204 | Whiteside | 41 47 26 N | 089 41 31 W |
| Sterling School (historical) | School | 183 | Macoupin | 39 02 30 N | 090 03 27 W |
| Sterling School (historical) | School | 201 | Montgomery | 39 13 54 N | 089 13 41 W |
| Sterling-Rock Falls Historical Society Museum | Building | 200 | Whiteside | 41 47 28 N | 089 40 48 W |
| Sterne's Fen Nature Preserve | Park | 254 | McHenry | 42 15 43 N | 088 18 10 W |
| Sternes Woods Park | Park | 272 | McHenry | 42 15 31 N | 088 18 22 W |
| Sterns Cemetery | Cemetery | 201 | Hancock | 40 28 41 N | 091 19 43 W |
| Steuben Club | Building | 182 | Cook | 41 53 05 N | 087 38 00 W |
| Steuben Elementary School | School | 189 | Kankakee | 41 06 50 N | 087 51 18 W |