Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| 17th Street Park | Park | 184 | Rock Island | 41 30 33 N | 090 24 19 W |
| 86th USARCOM Heliport | Airport | 189 | Cook | 41 51 52 N | 087 48 35 W |
| A C Buehler Library | Building | 212 | DuPage | 41 53 49 N | 087 56 43 W |
| A C Buttolph House | Building | 181 | Cook | 41 48 25 N | 087 36 07 W |
| A C Thompson Elementary School | School | 265 | Winnebago | 42 14 55 N | 089 00 58 W |
| A E Staley Cooling Lake | Reservoir | 200 | Macon | 39 50 54 N | 088 54 48 W |
| A E Staley Cooling Lake Dam | Dam | 200 | Macon | 39 50 54 N | 088 54 48 W |
| A F Ames Elementary School | School | 189 | Cook | 41 50 26 N | 087 49 10 W |
| A F Hill Park | Park | 192 | Will | 41 33 17 N | 088 03 54 W |
| A J Katzenmaier Middle School | School | 216 | Lake | 42 19 33 N | 087 51 52 W |
| A L Dawson Senior Park | Park | 138 | Jefferson | 38 18 13 N | 088 53 58 W |
| A O Marshall Elementary School | School | 197 | Will | 41 31 52 N | 088 02 42 W |
| A R Graiff Elementary School | School | 180 | Madison | 38 57 55 N | 089 45 50 W |
| A Vito Martinez Middle School | School | 201 | Will | 41 38 26 N | 088 06 02 W |
| A-AA-A Lincoln Driving School | School | 182 | Cook | 41 58 08 N | 087 43 05 W |
| A-Cosmopolitan Driver Training School | School | 189 | Cook | 41 58 02 N | 087 45 39 W |
| A-Delta Driving School | School | 185 | Cook | 41 51 05 N | 087 45 14 W |
| A-Harmans Driving School | School | 184 | Cook | 41 47 09 N | 087 42 10 W |
| A-Karrasel Nursery School | School | 183 | Cook | 41 55 29 N | 087 42 46 W |
| A-Karrasel Nursery School and Kindergarten | School | 181 | Cook | 41 56 13 N | 087 42 28 W |
| A-North Shore Driving School | School | 192 | Cook | 41 54 31 N | 087 48 00 W |
| A-North Shore Driving School | School | 187 | Cook | 41 58 30 N | 087 45 07 W |
| AAA Marina Incorporated | Locale | 179 | Cook | 41 54 09 N | 087 39 27 W |
| Aaron Park | Park | 200 | Lake | 42 26 13 N | 087 50 36 W |
| Abana Keypunch School | School | 182 | Cook | 41 58 08 N | 087 41 14 W |
| Abbe School (historical) | School | 254 | Boone | 42 18 18 N | 088 52 40 W |
| Abbeywood Park | Park | 225 | DuPage | 41 46 18 N | 088 05 52 W |
| Abbot | Populated Place | 148 | Pope | 37 33 26 N | 088 41 56 W |
| Abbot Hall | Building | 180 | Cook | 41 53 43 N | 087 37 00 W |
| Abbott Cemetery | Cemetery | 154 | Jasper | 38 53 12 N | 088 19 25 W |
| Abbott Ditch | Canal | 192 | Bureau | 41 22 52 N | 089 47 06 W |
| Abbott Elementary School | School | 181 | Cook | 41 49 41 N | 087 38 00 W |
| Abbott Memorial Hall | Building | 180 | Cook | 41 47 21 N | 087 36 08 W |
| Abbott Middle School | School | 249 | Kane | 42 01 58 N | 088 18 08 W |
| Abbott Park | Park | 182 | Cook | 41 43 15 N | 087 37 18 W |
| Abbott Power Plant | Building | 223 | Champaign | 40 06 16 N | 088 14 30 W |
| ABC Academy | School | 182 | Cook | 42 00 18 N | 087 41 53 W |
| ABC Adjustment School | School | 198 | Cook | 41 42 52 N | 087 40 15 W |
| ABC Nursery School | School | 181 | Cook | 41 57 05 N | 087 42 56 W |
| Abe Lincoln Elementary School | School | 184 | Cook | 41 49 39 N | 087 46 30 W |
| Abe Lincoln School | School | 181 | Logan | 40 09 25 N | 089 20 53 W |
| Aberdeen School (historical) | School | 226 | Pike | 39 39 03 N | 090 53 42 W |
| Abingdon | Populated Place | 229 | Knox | 40 48 16 N | 090 24 06 W |
| Abingdon Cemetery | Cemetery | 225 | Knox | 40 48 40 N | 090 24 29 W |
| Abingdon City Hall | Building | 232 | Knox | 40 48 09 N | 090 23 52 W |
| Abingdon High School | School | 225 | Knox | 40 48 01 N | 090 24 25 W |
| Abingdon Junior High School | School | 227 | Knox | 40 47 57 N | 090 24 03 W |
| Abingdon Post Office | Post Office | 228 | Knox | 40 48 09 N | 090 23 59 W |
| Abingdon Water Works | Locale | 231 | Knox | 40 48 17 N | 090 23 45 W |
| Abington Center School (historical) | School | 200 | Mercer | 41 07 17 N | 090 50 01 W |
| Abner Cemetery | Cemetery | 131 | Jefferson | 38 10 18 N | 088 58 37 W |
| Abney Family Cemetery | Cemetery | 129 | Saline | 37 48 15 N | 088 38 06 W |
| Abney Family Number 2 Cemetery | Cemetery | 131 | Saline | 37 46 55 N | 088 37 39 W |
| Abneyville Rock | Cliff | 124 | Jackson | 37 43 28 N | 089 24 44 W |
| Abraham Lincoln Centre | School | 183 | Cook | 41 49 28 N | 087 36 27 W |
| Abraham Lincoln Elementary School | School | 189 | Cook | 41 52 05 N | 087 47 45 W |
| Abraham Lincoln Elementary School | School | 235 | DuPage | 41 52 01 N | 088 04 29 W |
| Abraham Lincoln Elementary School | School | 202 | Kane | 41 44 57 N | 088 19 59 W |
| Abraham Lincoln Memorial Hospital | Hospital | 179 | Logan | 40 08 59 N | 089 22 16 W |
| Abraham Lincoln Memorial Hospital Heliport | Airport | 179 | Logan | 40 08 59 N | 089 22 16 W |
| Abraham Lincoln Middle School | School | 235 | Winnebago | 42 15 52 N | 089 04 15 W |
| Abraham Lincoln National Cemetery | Cemetery | 190 | Will | 41 23 37 N | 088 07 43 W |
| Abraham Lincoln National Cemtery | Cemetery | 190 | Will | 41 23 37 N | 088 07 43 W |
| Abraham Lincoln Presidential Library and Museum | Building | 182 | Sangamon | 39 48 06 N | 089 38 52 W |
| Abraham Lincoln School (historical) | School | 189 | Clark | 39 21 58 N | 087 52 41 W |
| Abrahamsen Park | Park | 229 | Cook | 42 01 19 N | 088 04 18 W |
| Absher Family Cemetery | Cemetery | 111 | White | 38 01 27 N | 088 03 36 W |
| Absher Lake | Reservoir | 128 | White | 38 04 54 N | 088 13 12 W |
| Absher Lake Dam | Dam | 128 | White | 38 04 54 N | 088 13 12 W |
| Abshire Cemetery | Cemetery | 113 | White | 37 58 30 N | 088 06 22 W |
| Abundance Baptist Church | Church | 184 | Cook | 41 36 37 N | 087 38 59 W |
| Abundant Life Assembly of God Church | Church | 226 | Winnebago | 42 17 02 N | 089 04 58 W |
| Abundant Life Church | Church | 205 | Peoria | 40 44 23 N | 089 38 25 W |
| Abundant Life Church | Church | 193 | St. Clair | 38 27 17 N | 090 06 22 W |
| Abundant Life Missionary Baptist Church | Church | 186 | Cook | 41 46 06 N | 087 40 52 W |
| Abundant Life New Life Fellowship Church | Church | 135 | Wabash | 38 24 29 N | 087 45 23 W |
| Acacia Country Club | Locale | 212 | Cook | 41 46 09 N | 087 53 28 W |
| Acacia Park Cemetery | Cemetery | 193 | Cook | 41 57 14 N | 087 49 37 W |
| Acacia Park Evangelical Lutheran Church | Church | 198 | Cook | 41 57 29 N | 087 49 00 W |
| Academy High School for Visual and Performing Arts | School | 178 | Cook | 41 52 46 N | 087 38 41 W |
| Academy Music Limited | School | 183 | Cook | 41 47 58 N | 087 42 12 W |
| Academy of Acupuncture | School | 182 | Cook | 41 56 07 N | 087 39 47 W |
| Academy of Music (historical) | School | 181 | Cook | 41 52 59 N | 087 37 48 W |
| Academy of Our Lady (historical) | School | 186 | Cook | 41 43 13 N | 087 39 20 W |
| Academy of Our Lady School | School | 156 | Peoria | 40 41 46 N | 089 35 14 W |
| Academy of Saint James College Prep School | School | 179 | Cook | 41 45 28 N | 087 33 55 W |
| Academy of Saint James College Preparatory School | School | 179 | Cook | 41 45 28 N | 087 33 55 W |
| Academy of Saint Martin De Porres Elementary School | School | 179 | Cook | 41 45 33 N | 087 34 01 W |
| Academy of Saint Martin DePorres Elementary School | School | 179 | Cook | 41 45 27 N | 087 34 01 W |
| Academy of Sciences | School | 183 | Cook | 41 55 07 N | 087 38 07 W |
| Academy Park | Park | 235 | DuPage | 41 52 31 N | 088 05 53 W |
| Acapulco Driving School | School | 183 | Cook | 41 51 06 N | 087 41 54 W |
| Acapulco Driving School | School | 182 | Cook | 41 51 29 N | 087 39 36 W |
| Accommodation School (historical) | School | 146 | Franklin | 38 04 58 N | 088 43 24 W |
| Accurate Data School | School | 187 | Cook | 41 57 12 N | 087 45 15 W |
| Ace Perry Point | Summit | 167 | Hardin | 37 30 20 N | 088 06 16 W |
| Achenback Lutheran Cemetery | Cemetery | 183 | Christian | 39 33 14 N | 089 25 45 W |
| Acheson School (historical) | School | 163 | Perry | 38 12 04 N | 089 33 35 W |
| Ackerman Creek | Stream | | Tazewell | 40 39 51 N | 089 30 29 W |
| Ackerman Park | Park | 185 | Cook | 42 03 51 N | 087 42 26 W |
| Ackerman Park | Park | 215 | DuPage | 41 53 33 N | 088 03 14 W |
| Ackleys Run | Stream | | Kendall | 41 35 52 N | 088 32 29 W |
| Ackman School (historical) | School | 195 | Schuyler | 40 11 35 N | 090 30 34 W |
| Acme Ditch | Canal | 204 | Henry | 41 20 11 N | 089 58 26 W |
| Acme Missionary Baptist Church | Church | 185 | Cook | 41 44 05 N | 087 38 47 W |
| Acme School (historical) | School | 203 | Henry | 41 20 38 N | 089 58 39 W |
| Acme School (historical) | School | 180 | Madison | 38 45 09 N | 089 56 14 W |
| Acorn Acres (subdivision) | Populated Place | 262 | Lake | 42 13 10 N | 088 05 36 W |
| Acorn Public Library | Building | 203 | Cook | 41 36 27 N | 087 45 24 W |
| Ada Park | Park | 188 | Cook | 41 41 19 N | 087 39 16 W |