Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Quad City Downs Racetrack | Park | 177 | Rock Island | 41 31 36 N | 090 23 16 W |
| Quad Citys Industrial Center | Locale | 175 | Rock Island | 41 30 31 N | 090 32 43 W |
| Quad-City Airport | Airport | 177 | Rock Island | 41 26 55 N | 090 30 23 W |
| Quad-City Seaplane Base | Airport | 168 | Rock Island | 41 27 36 N | 090 29 34 W |
| Quail Creek Country Club | Locale | 155 | Crawford | 39 01 19 N | 087 43 40 W |
| Quail Meadow | Flat | 204 | Peoria | 40 49 30 N | 089 47 45 W |
| Quail Run (subdivision) | Populated Place | 264 | Lake | 42 10 50 N | 088 05 25 W |
| Quail Run Park | Park | 264 | Lake | 42 10 48 N | 088 05 21 W |
| Quailtrap School (historical) | School | 287 | Boone | 42 23 09 N | 088 51 06 W |
| Quaker (historical) | Populated Place | 197 | Edgar | 39 51 40 N | 087 33 37 W |
| Quaker Cemetery | Cemetery | 191 | Fulton | 40 19 40 N | 090 22 12 W |
| Quaker Cemetery | Cemetery | 239 | Mercer | 41 19 12 N | 090 30 44 W |
| Quaker Hill School (historical) | School | 196 | Edgar | 39 52 04 N | 087 32 52 W |
| Quaker School (historical) | School | 201 | Iroquois | 40 35 50 N | 087 54 26 W |
| Quaker Tower | Building | 177 | Cook | 41 53 16 N | 087 37 50 W |
| Quandrangle Faculty Club | Building | 180 | Cook | 41 47 28 N | 087 35 52 W |
| Quarrel Creek | Stream | | Pope | 37 26 19 N | 088 34 36 W |
| Quarry Branch | Stream | | Clark | 39 17 08 N | 087 54 41 W |
| Quarry Hill Park | Park | 224 | Winnebago | 42 18 16 N | 089 08 26 W |
| Quarry Lake | Lake | 204 | DuPage | 41 46 13 N | 088 09 14 W |
| Quarry Park | Park | 202 | Kane | 41 50 33 N | 088 18 37 W |
| Quashquema (historical) | Populated Place | 188 | Hancock | 40 33 00 N | 091 23 12 W |
| Quatoga Bluff | Populated Place | 162 | Madison | 38 55 39 N | 090 14 54 W |
| Quebec School (historical) | School | 185 | Cass | 39 58 16 N | 090 07 04 W |
| Queen Anne School (historical) | School | 279 | McHenry | 42 22 14 N | 088 24 50 W |
| Queen Bee School | School | 244 | DuPage | 41 54 54 N | 088 04 51 W |
| Queen of All Saints Roman Catholic Church | Church | 186 | Cook | 41 59 42 N | 087 44 42 W |
| Queen of All Saints School | School | 186 | Cook | 41 59 40 N | 087 44 41 W |
| Queen of Angels Guild Hall | Building | 181 | Cook | 41 57 42 N | 087 41 21 W |
| Queen of Angels Roman Catholic Church | Church | 181 | Cook | 41 57 48 N | 087 41 17 W |
| Queen of Angels School | School | 181 | Cook | 41 57 50 N | 087 41 21 W |
| Queen of Apostles Catholic Church | Church | 183 | Cook | 41 37 55 N | 087 37 40 W |
| Queen of Apostles School (historical) | School | 183 | Cook | 41 37 55 N | 087 37 39 W |
| Queen of Heaven Cemetery | Cemetery | 205 | Cook | 41 51 32 N | 087 54 37 W |
| Queen of Martyrs School | School | 190 | Cook | 41 42 23 N | 087 42 36 W |
| Queen of Peace Catholic Church | Church | 198 | Lake | 42 20 04 N | 087 50 33 W |
| Queen of Peace High School | School | 189 | Cook | 41 45 13 N | 087 45 25 W |
| Queen of the Holy Rosary Roman Catholic Church | Church | 167 | La Salle | 41 19 53 N | 089 05 51 W |
| Queen of the Rosary School | School | 210 | Cook | 42 00 28 N | 087 59 38 W |
| Queen of the Universe School | School | 189 | Cook | 41 45 46 N | 087 43 03 W |
| Queens Island | Island | 225 | Lake | 42 22 59 N | 088 11 12 W |
| Queens Lake | Lake | 117 | Clinton | 38 26 59 N | 089 39 18 W |
| Queens Lake Branch | Stream | | St. Clair | 38 26 37 N | 089 39 25 W |
| Queens Lake Station (historical) | Locale | 126 | Clinton | 38 27 14 N | 089 39 17 W |
| Queensbury Greens Park | Park | 214 | DuPage | 41 47 02 N | 088 11 24 W |
| Quentin Corners | Populated Place | 245 | Lake | 42 09 59 N | 088 03 47 W |
| Quentin Road Christian School | School | 259 | Lake | 42 12 43 N | 088 03 35 W |
| Quercus Grove | Locale | 162 | Madison | 38 51 28 N | 089 53 33 W |
| Quercus Grove Cemetery | Cemetery | 161 | Madison | 38 51 35 N | 089 53 44 W |
| Quercus Grove Park | Park | 162 | Madison | 38 51 28 N | 089 53 33 W |
| Quercus Grove School | School | 163 | Madison | 38 51 28 N | 089 53 30 W |
| Quick Airport | Airport | 167 | Marion | 38 39 22 N | 089 02 18 W |
| Quigley Cemetery | Cemetery | 194 | Shelby | 39 29 15 N | 088 41 15 W |
| Quigley Preparatory School | School | 180 | Cook | 41 53 52 N | 087 37 32 W |
| Quigley Preparatory Seminary South | School | 186 | Cook | 41 45 08 N | 087 41 00 W |
| Quigley Seminary | School | 186 | Cook | 41 45 09 N | 087 41 05 W |
| Quilhot School (historical) | School | 268 | DeKalb | 41 45 39 N | 088 50 50 W |
| Quilmette Country Club (historical) | Locale | 176 | Cook | 42 04 51 N | 087 41 20 W |
| Quin School | School | 182 | Cook | 41 42 12 N | 087 48 48 W |
| Quincy | Populated Place | 173 | Adams | 39 56 08 N | 091 24 36 W |
| Quincy Bay | Bay | 143 | Adams | 39 57 16 N | 091 25 17 W |
| Quincy City Hall | Building | 179 | Adams | 39 56 06 N | 091 24 28 W |
| Quincy Commons Shopping Center | Locale | 201 | Adams | 39 56 04 N | 091 21 26 W |
| Quincy Country Club | Locale | 195 | Adams | 39 55 21 N | 091 22 11 W |
| Quincy East End Historic District | Park | 195 | Adams | 39 55 47 N | 091 23 14 W |
| Quincy Junction | Populated Place | 140 | Pike | 39 27 04 N | 091 01 30 W |
| Quincy Junior High School | School | 182 | Adams | 39 55 52 N | 091 23 40 W |
| Quincy Mall Shopping Center | Locale | 201 | Adams | 39 56 13 N | 091 21 48 W |
| Quincy Memorial Bridge | Bridge | 143 | Adams | 39 55 52 N | 091 25 14 W |
| Quincy Memorial Park Cemetery | Cemetery | 221 | Adams | 39 56 01 N | 091 19 56 W |
| Quincy Municipal Airport | Airport | 231 | Adams | 39 56 33 N | 091 11 40 W |
| Quincy Municipal Golf Course | Locale | 195 | Adams | 39 54 33 N | 091 21 52 W |
| Quincy Museum | Building | 189 | Adams | 39 55 55 N | 091 23 25 W |
| Quincy National Cemetery | Cemetery | 195 | Adams | 39 55 57 N | 091 21 27 W |
| Quincy Notre Dame High School | School | 174 | Adams | 39 54 52 N | 091 23 58 W |
| Quincy Post Office | Post Office | 184 | Adams | 39 56 00 N | 091 24 11 W |
| Quincy Public Library | Building | 178 | Adams | 39 55 49 N | 091 24 26 W |
| Quincy Senior High School | School | 197 | Adams | 39 55 49 N | 091 21 60 W |
| Quincy University | School | 191 | Adams | 39 56 23 N | 091 23 11 W |
| Quincy V Doudna Fine Arts Center | Building | 212 | Coles | 39 28 51 N | 088 10 29 W |
| Quinlan Park | Park | 185 | Cook | 42 03 43 N | 087 42 20 W |
| Quinlan School (historical) | School | 206 | Brown | 40 04 31 N | 090 45 45 W |
| Quinn Cemetery | Cemetery | 189 | Edgar | 39 29 49 N | 087 42 01 W |
| Quinn Cemetery | Cemetery | 156 | Jefferson | 38 15 21 N | 089 07 58 W |
| Quinn Chapel | Church | 199 | Coles | 39 37 19 N | 088 24 51 W |
| Quinn Chapel African Methodist Episcopal Church | Church | 182 | Cook | 41 50 56 N | 087 37 30 W |
| Quinn Chapel African Methodist Episcopal Church | Church | 126 | St. Clair | 38 39 32 N | 090 10 02 W |
| Quinn Park | Park | 183 | Cook | 41 59 44 N | 087 46 15 W |
| Quinn School (historical) | School | 253 | Livingston | 40 38 46 N | 088 20 07 W |
| Quinn School (historical) | School | 155 | Marshall | 41 08 01 N | 089 24 14 W |
| Quinn School (historical) | School | 219 | Stark | 41 04 34 N | 089 55 35 W |
| Quinsippi Island | Island | 144 | Adams | 39 56 31 N | 091 25 19 W |
| Quint/King Heliport | Airport | 124 | Monroe | 38 28 35 N | 090 14 10 W |
| Quinton Landing Strip | Airport | 222 | McLean | 40 17 14 N | 088 59 42 W |
| Quiver Beach | Populated Place | 142 | Mason | 40 19 48 N | 090 02 50 W |
| Quiver Creek | Stream | | Mason | 40 21 11 N | 090 01 24 W |
| Quiver Lake | Lake | 128 | Mason | 40 20 37 N | 090 02 20 W |
| Quiver Lake Post Office (historical) | Post Office | 142 | Mason | 40 19 48 N | 090 02 50 W |
| Quiver Presbyterian Cemetery | Cemetery | 149 | Mason | 40 20 57 N | 089 58 04 W |
| Quiver School (historical) | School | 136 | Mason | 40 20 42 N | 089 59 51 W |
| R A Wheatley Elementary School | School | 140 | Perry | 38 00 34 N | 089 13 47 W |
| R and S Airport | Airport | 175 | Sangamon | 39 47 53 N | 089 34 03 W |
| R H Love Galleries | Building | 179 | Cook | 41 53 39 N | 087 37 35 W |
| R K Welsh Elementary School | School | 226 | Winnebago | 42 17 43 N | 089 05 16 W |
| R R Donnelley Center | Building | 183 | Cook | 41 53 11 N | 087 37 50 W |
| Raab School | School | 162 | St. Clair | 38 30 44 N | 090 00 06 W |
| Rabbi L Kaplan Hebrew Educational Center | School | 181 | Cook | 42 00 01 N | 087 42 00 W |
| Rabbit Burrow School (historical) | School | 226 | McDonough | 40 33 28 N | 090 49 07 W |
| Rabbit Grove Cemetery | Cemetery | 170 | Marion | 38 33 46 N | 088 51 38 W |
| Rabbit Grove Church | Church | 170 | Marion | 38 33 46 N | 088 51 40 W |