Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Sacred Heart Catholic Church | Church | 198 | Douglas | 39 51 53 N | 088 09 51 W |
| Sacred Heart Catholic Church | Church | 210 | McDonough | 40 24 49 N | 090 50 24 W |
| Sacred Heart Catholic Church | Church | 247 | McHenry | 42 15 11 N | 088 36 20 W |
| Sacred Heart Catholic Church | Church | 140 | Perry | 38 00 42 N | 089 14 31 W |
| Sacred Heart Catholic Church | Church | 206 | Whiteside | 41 48 30 N | 089 42 33 W |
| Sacred Heart Cemetery | Cemetery | 200 | Cook | 42 08 32 N | 087 48 25 W |
| Sacred Heart Cemetery | Cemetery | 192 | Henry | 41 26 16 N | 089 56 32 W |
| Sacred Heart Cemetery | Cemetery | 202 | Livingston | 41 01 08 N | 088 18 17 W |
| Sacred Heart Cemetery | Cemetery | 176 | Madison | 38 57 12 N | 089 45 52 W |
| Sacred Heart Cemetery | Cemetery | 188 | McDonough | 40 25 38 N | 090 50 39 W |
| Sacred Heart Cemetery | Cemetery | 246 | McHenry | 42 15 36 N | 088 36 35 W |
| Sacred Heart Cemetery | Cemetery | 207 | Morgan | 39 37 41 N | 090 01 18 W |
| Sacred Heart Cemetery | Cemetery | 131 | Perry | 38 00 50 N | 089 17 03 W |
| Sacred Heart Cemetery | Cemetery | 207 | Putnam | 41 16 04 N | 089 14 10 W |
| Sacred Heart Cemetery | Cemetery | 202 | Shelby | 39 17 19 N | 089 05 27 W |
| Sacred Heart Church | Church | 182 | Cook | 41 41 19 N | 087 49 14 W |
| Sacred Heart Church | Church | 193 | Cook | 41 53 41 N | 087 51 08 W |
| Sacred Heart Church | Church | 187 | Cumberland | 39 11 24 N | 088 27 14 W |
| Sacred Heart Church | Church | 221 | De Witt | 40 14 56 N | 088 38 40 W |
| Sacred Heart Church | Church | 216 | DuPage | 41 53 03 N | 088 01 28 W |
| Sacred Heart Church | Church | 191 | Henry | 41 23 57 N | 089 54 30 W |
| Sacred Heart Church | Church | 202 | Macoupin | 39 30 29 N | 089 46 00 W |
| Sacred Heart Church | Church | 182 | Madison | 38 58 27 N | 089 45 53 W |
| Sacred Heart Church | Church | 212 | Putnam | 41 15 52 N | 089 13 53 W |
| Sacred Heart Church | Church | 176 | Rock Island | 41 30 26 N | 090 33 37 W |
| Sacred Heart Church Hall | Building | 182 | Cook | 41 46 00 N | 087 39 07 W |
| Sacred Heart Convent | Church | 181 | Cook | 41 48 33 N | 087 40 19 W |
| Sacred Heart Convent | Church | 182 | Cook | 41 59 46 N | 087 39 21 W |
| Sacred Heart Hospital | Hospital | 184 | Cook | 41 53 26 N | 087 42 29 W |
| Sacred Heart Monastery | School | 220 | DuPage | 41 47 06 N | 088 05 20 W |
| Sacred Heart of Jesus Old Catholic Church | Church | 184 | Cook | 41 57 21 N | 087 43 54 W |
| Sacred Heart Roman Catholic Church | Church | 207 | Kane | 41 45 21 N | 088 17 55 W |
| Sacred Heart Roman Catholic Church | Church | 192 | La Salle | 41 17 54 N | 089 03 46 W |
| Sacred Heart Roman Catholic Church | Church | 128 | Madison | 38 42 29 N | 090 07 55 W |
| Sacred Heart Roman Catholic Church | Church | 127 | St. Clair | 38 37 57 N | 090 08 34 W |
| Sacred Heart Roman Catholic Church | Church | 165 | Will | 41 31 03 N | 088 05 00 W |
| Sacred Heart School | School | 183 | Cook | 41 59 44 N | 087 39 21 W |
| Sacred Heart School | School | 182 | Cook | 41 45 59 N | 087 39 13 W |
| Sacred Heart School | School | 181 | Cook | 41 48 35 N | 087 40 19 W |
| Sacred Heart School | School | 178 | Cook | 41 43 16 N | 087 33 09 W |
| Sacred Heart School | School | 193 | Cook | 41 53 41 N | 087 51 08 W |
| Sacred Heart School | School | 202 | Cook | 42 07 01 N | 087 44 43 W |
| Sacred Heart School | School | 216 | DuPage | 41 53 03 N | 088 01 31 W |
| Sacred Heart School | School | 208 | Kane | 41 45 19 N | 088 17 52 W |
| Sacred Heart School | School | 128 | Madison | 38 42 31 N | 090 07 53 W |
| Sacred Heart School | School | 140 | Perry | 38 00 42 N | 089 14 32 W |
| Sacred Heart School | School | 176 | Rock Island | 41 30 26 N | 090 33 37 W |
| Sacred Heart School | School | 127 | St. Clair | 38 37 58 N | 090 08 33 W |
| Sacred Heart Seminary | School | 194 | Cook | 41 54 03 N | 087 52 50 W |
| Sacred Heart Seminary | School | 214 | Kane | 41 52 46 N | 088 18 29 W |
| Sacred Hearth Catholic Church | Church | 229 | Knox | 40 48 24 N | 090 23 56 W |
| Sacred Hearth Church | Church | 155 | Peoria | 40 41 36 N | 089 35 34 W |
| Sacred Hearth School | School | 214 | Christian | 39 23 11 N | 089 05 01 W |
| Sacred Hearth School | School | 179 | Effingham | 39 07 08 N | 088 32 45 W |
| Sacred Hearth School | School | 156 | Peoria | 40 41 37 N | 089 35 35 W |
| Saddle and Cycle Club (historical) | Locale | 179 | Cook | 41 58 40 N | 087 39 08 W |
| Saddle Dam Number 2 | Dam | 142 | Clinton | 38 36 44 N | 089 18 54 W |
| Saddle Dam Number 3 | Dam | 141 | Clinton | 38 37 37 N | 089 15 21 W |
| Saddlewood (subdivision) | Populated Place | 232 | DuPage | 41 53 32 N | 088 04 33 W |
| Sadlebrook Park | Park | 223 | DuPage | 41 49 20 N | 087 58 53 W |
| Sadler School (historical) | School | 168 | Fayette | 38 50 42 N | 089 00 50 W |
| Sadler School (historical) | School | 256 | Henry | 41 11 37 N | 089 57 51 W |
| Sadler School (historical) | School | 192 | Saline | 37 37 21 N | 088 27 20 W |
| Sadorus | Populated Place | 211 | Champaign | 39 58 01 N | 088 20 47 W |
| Sadorus Cemetery | Cemetery | 208 | Champaign | 39 57 17 N | 088 21 34 W |
| Sadorus Grade School | School | 211 | Champaign | 39 57 49 N | 088 20 42 W |
| Safety Park | Park | 207 | Whiteside | 41 48 15 N | 089 41 35 W |
| Safety Tower Park | Park | 247 | McLean | 40 30 04 N | 088 58 05 W |
| Sag Bridge | Populated Place | 190 | Cook | 41 41 18 N | 087 55 59 W |
| Sag Bridge Station (historical) | Locale | 186 | Cook | 41 41 53 N | 087 56 16 W |
| Saganashkee Slough | Gut | 180 | Cook | 41 41 32 N | 087 53 27 W |
| Saganashkee Slough | Reservoir | 180 | Cook | 41 41 36 N | 087 54 12 W |
| Saganashkee Slough | Reservoir | 179 | Cook | 41 41 30 N | 087 53 54 W |
| Saganashkee Slough | Reservoir | 177 | Cook | 41 41 24 N | 087 53 36 W |
| Saganashkee Slough | Reservoir | 176 | Cook | 41 41 24 N | 087 53 24 W |
| Saganashkee Slough | Reservoir | 184 | Cook | 41 41 18 N | 087 53 06 W |
| Saganashkee Slough | Reservoir | 176 | Cook | 41 41 18 N | 087 52 48 W |
| Saganashkee Slough | Reservoir | 177 | Cook | 41 41 18 N | 087 52 30 W |
| Sagawau Canyon Nature Preserve | Park | 191 | Cook | 41 41 17 N | 087 55 31 W |
| Sage School (historical) | School | 222 | Carroll | 42 11 18 N | 089 59 06 W |
| Sager School (historical) | School | 262 | Boone | 42 14 29 N | 088 49 21 W |
| Sahara Mine Number 16 | Mine | 114 | Saline | 37 43 58 N | 088 36 49 W |
| Sahara Mine Number 5 | Mine | 131 | Saline | 37 42 39 N | 088 40 57 W |
| Sahara Mine Number 7 | Mine | 126 | Saline | 37 44 10 N | 088 39 30 W |
| Saidora | Populated Place | 145 | Mason | 40 06 18 N | 090 08 41 W |
| Sailer School (historical) | School | 209 | Warren | 40 39 45 N | 090 28 23 W |
| Sailor Springs | Populated Place | 134 | Clay | 38 45 50 N | 088 21 47 W |
| Sailor Springs Oil Field | Oilfield | 136 | Clay | 38 45 23 N | 088 23 30 W |
| Sailor Springs Post Office | Post Office | 136 | Clay | 38 45 48 N | 088 21 42 W |
| Sain Park | Park | 181 | Cook | 41 52 47 N | 087 41 16 W |
| Saint Adalbert Cemetery | Cemetery | 147 | St. Clair | 38 35 11 N | 090 02 03 W |
| Saint Adalbert School | School | 183 | Cook | 41 51 35 N | 087 40 04 W |
| Saint Adalberts Roman Catholic Church | Church | 183 | Cook | 41 51 33 N | 087 40 04 W |
| Saint Adalberts Roman Catholic Church | Church | 128 | St. Clair | 38 37 47 N | 090 08 56 W |
| Saint Adalberts School | School | 128 | St. Clair | 38 37 47 N | 090 08 57 W |
| Saint Adelbert Cemetery | Cemetery | 195 | Cook | 42 00 16 N | 087 48 13 W |
| Saint Adrian School | School | 185 | Cook | 41 45 54 N | 087 41 27 W |
| Saint Adrians Roman Catholic Church | Church | 184 | Cook | 41 45 57 N | 087 41 28 W |
| Saint Agatha Catholic Church | Church | 130 | St. Clair | 38 19 22 N | 089 52 32 W |
| Saint Agatha Cemetery | Cemetery | 149 | St. Clair | 38 24 18 N | 089 51 49 W |
| Saint Agatha Cemetery | Cemetery | 127 | St. Clair | 38 18 57 N | 089 51 47 W |
| Saint Agathas Roman Catholic Church | Church | 180 | Cook | 41 51 44 N | 087 42 17 W |
| Saint Agathas School | School | 181 | Cook | 41 51 44 N | 087 42 18 W |
| Saint Agnes Cemetery | Cemetery | 187 | Montgomery | 39 09 15 N | 089 30 09 W |
| Saint Agnes Roman Catholic Church | Church | 182 | Cook | 41 49 23 N | 087 41 30 W |
| Saint Agnes Roman Catholic Church | Church | 189 | Montgomery | 39 09 17 N | 089 29 31 W |
| Saint Agnes School | School | 202 | Cook | 41 30 15 N | 087 38 24 W |
| Saint Agnes School | School | 182 | Cook | 41 49 25 N | 087 41 30 W |
| Saint Agnes School | School | 190 | Montgomery | 39 09 16 N | 089 29 33 W |
| Saint Aidan's Episcopal Church | Church | 193 | Cook | 41 39 38 N | 087 40 56 W |