Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Deer Lake | Populated Place | 263 | Cook | 42 09 01 N | 088 05 59 W |
| Deer Lake | Reservoir | 130 | Jackson | 37 43 23 N | 089 15 22 W |
| Deer Lake | Reservoir | 205 | Will | 41 27 35 N | 087 36 32 W |
| Deer Lake Dam | Dam | 205 | Will | 41 27 35 N | 087 36 32 W |
| Deer Lake Meadows (subdivision) | Populated Place | 257 | Lake | 42 09 54 N | 088 05 45 W |
| Deer Lick Creek | Stream | | Peoria | 40 44 22 N | 089 44 17 W |
| Deer Lick Hollow | Valley | | Jersey | 38 58 07 N | 090 30 14 W |
| Deer Park | Park | 210 | DuPage | 41 57 02 N | 087 57 16 W |
| Deer Park | Populated Place | 168 | La Salle | 41 17 42 N | 089 02 10 W |
| Deer Park | Populated Place | 259 | Lake | 42 09 39 N | 088 04 53 W |
| Deer Park Church | Church | 204 | La Salle | 41 16 28 N | 088 57 05 W |
| Deer Park Community Consolidated Elementary School | School | 213 | La Salle | 41 16 24 N | 088 57 56 W |
| Deer Park Country Club | Locale | 193 | La Salle | 41 18 12 N | 089 01 42 W |
| Deer Park Lake | Reservoir | 184 | La Salle | 41 17 30 N | 089 02 30 W |
| Deer Park Lake Dam | Dam | 184 | La Salle | 41 17 30 N | 089 02 30 W |
| Deer Park Office Center | Locale | 243 | Lake | 42 09 22 N | 088 03 25 W |
| Deer Park Station (historical) | Locale | 143 | La Salle | 41 17 39 N | 089 02 01 W |
| Deer Park Town Center Shopping Center | Locale | 242 | Lake | 42 09 42 N | 088 03 12 W |
| Deer Path Middle School | School | 206 | Lake | 42 14 06 N | 087 52 29 W |
| Deer Path Picnic Area | Locale | 229 | Lake | 42 27 28 N | 088 11 11 W |
| Deer Plain | Populated Place | 138 | Calhoun | 38 55 54 N | 090 31 59 W |
| Deer Plain Ferry | Locale | 126 | Calhoun | 38 57 56 N | 090 29 41 W |
| Deer Plain School (historical) | School | 137 | Calhoun | 38 55 28 N | 090 31 45 W |
| Deer Pond Nature Preserve | Park | 113 | Johnson | 37 25 45 N | 088 56 09 W |
| Deer Ridge | Populated Place | 186 | Johnson | 37 34 30 N | 088 56 18 W |
| Deer Run | Populated Place | 247 | Kane | 41 56 54 N | 088 23 37 W |
| Deer Run Campground | Locale | 181 | Christian | 39 39 13 N | 089 28 11 W |
| Deer Run Hiking Trail | Trail | 162 | Tazewell | 40 26 35 N | 089 53 36 W |
| Deer Run Lake | Reservoir | 193 | Macoupin | 39 12 09 N | 089 49 15 W |
| Deer Run Lake Dam | Dam | 193 | Macoupin | 39 12 09 N | 089 49 15 W |
| Deer Run Picnic Area | Locale | 140 | Clinton | 38 37 55 N | 089 17 23 W |
| Deer Run Trail | Trail | 209 | Adams | 39 53 34 N | 090 55 15 W |
| Deer Spring Park | Park | 204 | Lake | 42 10 09 N | 087 50 03 W |
| Deerbrook Shopping Center | Locale | 200 | Cook | 42 09 00 N | 087 50 09 W |
| Deerfield | Populated Place | 209 | Lake | 42 10 16 N | 087 50 40 W |
| Deerfield Cemetery | Cemetery | 212 | Lake | 42 09 50 N | 087 50 39 W |
| Deerfield High School | School | 202 | Lake | 42 11 11 N | 087 51 10 W |
| Deerfield Park | Park | 241 | Cook | 42 01 41 N | 088 11 41 W |
| Deerfield Park District Golf Course | Locale | 201 | Lake | 42 09 50 N | 087 53 07 W |
| Deerfield School | School | 209 | Lake | 42 10 00 N | 087 50 27 W |
| Deering City | Populated Place | 119 | Franklin | 37 54 59 N | 088 53 31 W |
| Deering Library | Building | 183 | Cook | 42 03 12 N | 087 40 31 W |
| Deerlick Branch | Stream | | Mercer | 41 17 42 N | 090 53 14 W |
| Deerpath | Populated Place | 204 | Lake | 42 14 53 N | 087 51 34 W |
| Deerpath Community Park | Park | 202 | Lake | 42 14 47 N | 087 51 01 W |
| Deerpath Court Shopping Center | Locale | 271 | Lake | 42 11 08 N | 088 05 22 W |
| Deerpath Estates (subdivision) | Populated Place | 264 | Lake | 42 10 07 N | 088 05 09 W |
| Deerpath Golf Course | Locale | 202 | Lake | 42 15 17 N | 087 51 34 W |
| Deerpath Hall | Building | 201 | Lake | 42 15 09 N | 087 49 46 W |
| Deerpath Middle School | School | 207 | Lake | 42 14 55 N | 087 50 57 W |
| Deerpath Park | Park | 206 | Lake | 42 13 57 N | 087 57 28 W |
| Deers | Populated Place | 211 | Champaign | 40 03 18 N | 088 07 21 W |
| Dees | Populated Place | 181 | Cumberland | 39 13 23 N | 088 09 33 W |
| Dees School (historical) | School | 157 | Jefferson | 38 13 54 N | 089 05 29 W |
| Defenbaugh Cemetery | Cemetery | 188 | Livingston | 41 02 49 N | 088 51 06 W |
| Defenbaugh School | School | 187 | Livingston | 41 04 36 N | 088 49 59 W |
| Defender Mine | Mine | 191 | Hardin | 37 30 40 N | 088 12 06 W |
| Defiance Lake | Lake | 224 | McHenry | 42 19 10 N | 088 13 32 W |
| Defiance School (historical) | School | 175 | Effingham | 39 05 03 N | 088 37 40 W |
| Defiance School (historical) | School | 265 | Stephenson | 42 26 27 N | 089 45 50 W |
| DeGarmo Hall | Building | 242 | McLean | 40 30 32 N | 088 59 33 W |
| DeGerlia Hollow | Valley | | Calhoun | 39 11 44 N | 090 36 35 W |
| Degognia | Populated Place | 215 | Jackson | 37 51 40 N | 089 37 49 W |
| Degognia Creek | Stream | | Randolph | 37 48 11 N | 089 40 27 W |
| DeGraff School (historical) | School | 140 | Perry | 38 05 10 N | 089 31 38 W |
| DeHart Cemetery | Cemetery | 192 | Brown | 39 53 17 N | 090 52 28 W |
| Dehm School (historical) | School | 201 | Ford | 40 50 10 N | 088 13 20 W |
| Dehne Cemetery | Cemetery | 188 | Macoupin | 39 00 48 N | 090 07 41 W |
| Dehne School (historical) | School | 191 | Macoupin | 39 00 43 N | 090 07 38 W |
| Deicke Park | Park | 272 | McHenry | 42 09 45 N | 088 25 47 W |
| Deitrich School (historical) | School | 274 | DeKalb | 41 54 24 N | 088 44 01 W |
| DeJulio Playlot | Park | 186 | Cook | 41 59 27 N | 087 45 14 W |
| DeKalb | Populated Place | 268 | DeKalb | 41 55 46 N | 088 45 01 W |
| DeKalb County | Civil | 270 | DeKalb | 41 55 00 N | 088 45 01 W |
| DeKalb County Administration Building | Building | 265 | DeKalb | 41 59 25 N | 088 41 01 W |
| DeKalb County Courthouse | Building | 265 | DeKalb | 41 59 22 N | 088 41 06 W |
| DeKalb County Nursing Home | Locale | 268 | DeKalb | 41 57 11 N | 088 43 32 W |
| DeKalb County Public Safety Building | Building | 266 | DeKalb | 41 59 21 N | 088 41 03 W |
| DeKalb High School | School | 270 | DeKalb | 41 54 42 N | 088 45 17 W |
| DeKalb Post Office | Post Office | 268 | DeKalb | 41 55 42 N | 088 45 03 W |
| DeKalb Taylor Municipal Airport | Airport | 278 | DeKalb | 41 55 47 N | 088 42 48 W |
| Del Iglesia Baupista | Church | 180 | Cook | 41 43 54 N | 087 32 59 W |
| Del Mar Woods | Populated Place | 201 | Lake | 42 12 00 N | 087 51 18 W |
| Delabar State Park | Park | 171 | Henderson | 40 57 44 N | 090 56 22 W |
| Delafield | Populated Place | 126 | Hamilton | 38 08 52 N | 088 36 10 W |
| Delafield School (historical) | School | 132 | Hamilton | 38 08 22 N | 088 35 38 W |
| DeLancy School (historical) | School | 250 | Kane | 41 59 08 N | 088 21 55 W |
| Deland Cemetery | Cemetery | 214 | Piatt | 40 07 34 N | 088 38 52 W |
| Deland-Weldon High School | School | 215 | De Witt | 40 07 44 N | 088 41 15 W |
| Delano Elementary School | School | 184 | Cook | 41 52 42 N | 087 43 28 W |
| Delassus Landing Field | Airport | 116 | Randolph | 37 54 51 N | 089 56 21 W |
| Delavan | Populated Place | 188 | Tazewell | 40 22 21 N | 089 32 50 W |
| Delavan High School | School | 180 | Tazewell | 40 21 58 N | 089 32 54 W |
| Delaware Building | Building | 181 | Cook | 41 53 05 N | 087 37 45 W |
| Delbert Egan Housing Project | Populated Place | 190 | La Salle | 41 08 23 N | 088 50 30 W |
| Delbridge Island | Island | 140 | La Salle | 41 19 02 N | 088 55 27 W |
| Deleat this record | Cemetery | 207 | Coles | 39 27 45 N | 088 16 45 W |
| Delehanty School (historical) | School | 297 | McHenry | 42 24 12 N | 088 30 07 W |
| Delhi | Populated Place | 183 | Jersey | 39 02 43 N | 090 15 21 W |
| Delhi Baptist Church | Church | 183 | Jersey | 39 02 45 N | 090 15 19 W |
| Delhi Elementary School | School | 181 | Jersey | 39 02 36 N | 090 15 33 W |
| Delhi School (historical) | School | 200 | Whiteside | 41 46 20 N | 089 59 50 W |
| Delhotal Airport | Airport | 231 | Lee | 41 44 10 N | 089 10 20 W |
| Deliverance Church of Rockford | Church | 246 | Winnebago | 42 16 37 N | 089 07 36 W |
| Dell Abbey | Locale | 166 | Grundy | 41 20 04 N | 088 17 47 W |
| Della Park | Park | 271 | McHenry | 42 14 10 N | 088 22 46 W |
| Dellitt Lake | Reservoir | 219 | Mercer | 41 10 06 N | 090 43 42 W |
| Dellitt Lake Dam | Dam | 219 | Mercer | 41 10 06 N | 090 43 42 W |
| Dells Apostolic Christian Cemetery | Cemetery | 221 | Woodford | 40 37 51 N | 089 14 30 W |
| Dellwood Park | Park | 187 | Will | 41 34 24 N | 088 03 47 W |