Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Duck Pond Cemetery | Cemetery | 176 | Cumberland | 39 15 28 N | 088 05 02 W |
| Duck Pond School (historical) | School | 238 | Henderson | 40 39 09 N | 090 50 46 W |
| Duck Pond School (historical) | School | 116 | White | 38 07 04 N | 088 00 48 W |
| Duck Slough | Gut | 132 | Cass | 40 05 42 N | 090 21 00 W |
| Ducks Misery | Swamp | 232 | Stephenson | 42 20 22 N | 089 40 13 W |
| Ducktown (subdivision) | Populated Place | 183 | Cook | 41 49 53 N | 087 40 30 W |
| Duckworth School (historical) | School | 211 | Iroquois | 40 59 09 N | 088 02 07 W |
| Dudley | Populated Place | 218 | Edgar | 39 34 36 N | 087 51 00 W |
| Dudley Branch | Stream | | Coles | 39 30 40 N | 088 03 22 W |
| Dudley School (historical) | School | 209 | Coles | 39 30 14 N | 088 01 52 W |
| Dudleyville | Populated Place | 159 | Bond | 38 49 26 N | 089 25 05 W |
| Duff School (historical) | School | 223 | Henry | 41 26 02 N | 090 12 41 W |
| Duff School (historical) | School | 182 | Logan | 40 09 00 N | 089 19 15 W |
| Duff School (historical) | School | 215 | Mercer | 41 12 04 N | 090 48 04 W |
| Duffield School (historical) | School | 158 | Fulton | 40 34 10 N | 089 53 33 W |
| Duffield School (historical) | School | 188 | La Salle | 41 19 03 N | 088 48 03 W |
| Duffle School (historical) | School | 193 | Douglas | 39 42 36 N | 088 09 31 W |
| Dug Hill | Summit | 221 | Jersey | 39 02 52 N | 090 32 09 W |
| Dugdale Park | Park | 199 | Lake | 42 20 44 N | 087 51 00 W |
| Duggan Cemetery | Cemetery | 169 | Crawford | 39 09 54 N | 087 53 33 W |
| Dugger Cemetery | Cemetery | 187 | Macoupin | 39 17 29 N | 089 53 31 W |
| Dugger Cemetery | Cemetery | 157 | Madison | 38 44 04 N | 089 45 32 W |
| Dugout Creek | Stream | | Henderson | 40 41 11 N | 091 05 53 W |
| Dugout Creek | Stream | | Henry | 41 12 27 N | 090 12 17 W |
| Dugout Run | Stream | | Mercer | 41 10 02 N | 090 40 02 W |
| Dugout School (historical) | School | 203 | Shelby | 39 26 05 N | 088 44 16 W |
| Duis School (historical) | School | 222 | Lee | 41 46 26 N | 089 28 35 W |
| Dujardin Elementary School | School | 230 | DuPage | 41 57 05 N | 088 03 58 W |
| Duke and Duchess Pre-School | School | 181 | Cook | 41 57 03 N | 087 39 14 W |
| Duke Creek | Stream | | Jo Daviess | 42 15 54 N | 090 16 32 W |
| Dukes Cemetery | Cemetery | 204 | Vermilion | 40 02 55 N | 087 38 04 W |
| Dullam Cemetery | Cemetery | 290 | Boone | 42 26 10 N | 088 43 31 W |
| Dullam School (historical) | School | 281 | Boone | 42 25 45 N | 088 43 47 W |
| Dulles Elementary School | School | 181 | Cook | 41 46 47 N | 087 36 59 W |
| Dumas Elementary School | School | 180 | Cook | 41 46 27 N | 087 36 04 W |
| Dumbach Hall | Building | 180 | Cook | 42 00 02 N | 087 39 29 W |
| Dummer Attendence Center | School | 200 | DeKalb | 41 38 28 N | 088 37 07 W |
| Dummy Junction | Locale | 186 | Cook | 41 43 05 N | 087 39 06 W |
| Dums Creek | Stream | | Marion | 38 37 32 N | 088 44 27 W |
| Dunaway Park | Park | 189 | Cass | 39 56 39 N | 090 13 05 W |
| Dunbar Creek | Stream | | Hancock | 40 28 36 N | 091 01 43 W |
| Dunbar High School | School | 182 | Cook | 41 50 27 N | 087 37 05 W |
| Dunbar Park | Park | 182 | Cook | 41 50 25 N | 087 37 15 W |
| Dunbar Public School (historical) | School | 126 | Madison | 38 40 56 N | 090 10 09 W |
| Dunbar Public School (historical) | School | 167 | Madison | 38 54 37 N | 090 09 01 W |
| Dunbrook Shopping Center | Locale | 202 | Cook | 42 08 20 N | 087 50 52 W |
| Duncan | Populated Place | 201 | Stark | 40 59 01 N | 089 47 21 W |
| Duncan Cemetery | Cemetery | 153 | Bond | 38 46 16 N | 089 15 52 W |
| Duncan Cemetery | Cemetery | 210 | McDonough | 40 33 01 N | 090 54 01 W |
| Duncan Cemetery | Cemetery | 226 | Mercer | 41 17 13 N | 090 51 04 W |
| Duncan Cemetery | Cemetery | 134 | Williamson | 37 50 25 N | 088 56 13 W |
| Duncan Church (historical) | Church | 178 | McDonough | 40 20 54 N | 090 49 52 W |
| Duncan Mills | Populated Place | 144 | Fulton | 40 20 24 N | 090 11 27 W |
| Duncan Mills Bridge | Bridge | 131 | Fulton | 40 20 26 N | 090 11 22 W |
| Duncan Mills School (historical) | School | 174 | Fulton | 40 19 37 N | 090 11 26 W |
| Duncan Park | Park | 200 | Morgan | 39 44 06 N | 090 15 01 W |
| Duncan School (historical) | School | 145 | Bond | 38 46 17 N | 089 16 24 W |
| Duncan School (historical) | School | 189 | Macoupin | 39 23 29 N | 089 57 18 W |
| Duncan School (historical) | School | 155 | Perry | 38 12 05 N | 089 24 11 W |
| Duncan School (historical) | School | 144 | Saline | 37 37 44 N | 088 34 44 W |
| Duncan Spring | Spring | 157 | Morgan | 39 48 49 N | 090 19 56 W |
| Duncan Springs School (historical) | School | 181 | Morgan | 39 48 34 N | 090 19 52 W |
| Duncan Town Hall | Locale | 230 | Mercer | 41 17 12 N | 090 50 25 W |
| Duncans Addition (subdivision) | Populated Place | 179 | Cook | 41 52 40 N | 087 38 59 W |
| Duncanville | Populated Place | 162 | Crawford | 38 57 17 N | 087 41 44 W |
| Duncanville Cemetery | Cemetery | 161 | Crawford | 38 57 21 N | 087 41 46 W |
| Dundas | Populated Place | 144 | Richland | 38 50 06 N | 088 05 06 W |
| Dundas Cemetery | Cemetery | 142 | Richland | 38 49 58 N | 088 04 54 W |
| Dundas Post Office | Post Office | 144 | Richland | 38 50 05 N | 088 05 01 W |
| Dundee Crown High School | School | 263 | Kane | 42 08 02 N | 088 16 10 W |
| Dundee High School | School | 228 | Kane | 42 06 29 N | 088 16 28 W |
| Dundee Highlands Elementary School | School | 228 | Kane | 42 05 38 N | 088 16 54 W |
| Dundee Junior High School | School | 238 | Kane | 42 06 16 N | 088 17 21 W |
| Dundee Middle School | School | 281 | Kane | 42 06 19 N | 088 20 36 W |
| Dundee Plaza Shopping Center | Locale | 197 | Cook | 42 08 20 N | 087 54 55 W |
| Dundee Point Shopping Center | Locale | 206 | Cook | 42 08 22 N | 087 57 33 W |
| Dundee Township East Cemetery | Cemetery | 256 | Kane | 42 05 43 N | 088 15 22 W |
| Dundee Township Library | Building | 256 | Kane | 42 06 14 N | 088 15 50 W |
| Dundee Township Recreation and Fitness Center | Park | 257 | Kane | 42 06 16 N | 088 15 46 W |
| Dundee Township West Cemetery | Cemetery | 235 | Kane | 42 06 09 N | 088 17 16 W |
| Dundey Cemetery | Cemetery | 160 | Hancock | 40 32 43 N | 091 24 05 W |
| Dunes Park | Populated Place | 193 | Lake | 42 25 15 N | 087 49 32 W |
| Dunfermline | Populated Place | 193 | Fulton | 40 29 28 N | 090 01 54 W |
| Dunfermline School (historical) | School | 193 | Fulton | 40 29 15 N | 090 01 55 W |
| Dunham Castle | Populated Place | 237 | Kane | 41 57 08 N | 088 16 17 W |
| Dunham Hall | Building | 213 | Kane | 41 45 19 N | 088 20 58 W |
| Dunham Hunt Museum | Building | 225 | Kane | 41 54 53 N | 088 18 39 W |
| Dunham Park | Park | 190 | Cook | 41 57 57 N | 087 47 05 W |
| Dunham Place Park | Park | 231 | DuPage | 41 45 30 N | 088 01 11 W |
| Dunham School (historical) | School | 271 | McHenry | 42 24 40 N | 088 40 22 W |
| Dunhurst Shopping Center | Locale | 199 | Cook | 42 08 18 N | 087 56 17 W |
| Dunk School (historical) | School | 160 | Edwards | 38 17 30 N | 088 03 14 W |
| Dunkard Brethren Church | Church | 181 | Fulton | 40 11 45 N | 090 21 25 W |
| Dunkard Cemetery | Cemetery | 219 | Adams | 39 57 36 N | 090 56 38 W |
| Dunkard Cemetery | Cemetery | 170 | Bond | 38 56 45 N | 089 18 44 W |
| Dunkard Cemetery | Cemetery | 177 | Fayette | 39 07 49 N | 088 54 36 W |
| Dunkard Cemetery | Cemetery | 172 | Marion | 38 35 30 N | 088 53 14 W |
| Dunkard Cemetery | Cemetery | 186 | McDonough | 40 19 44 N | 090 46 58 W |
| Dunkard Cemetery | Cemetery | 240 | Piatt | 40 14 15 N | 088 27 42 W |
| Dunkel | Populated Place | 202 | Christian | 39 28 05 N | 089 03 46 W |
| Dunkle School (historical) | School | 198 | Christian | 39 28 44 N | 089 03 12 W |
| Dunlap | Populated Place | 224 | Peoria | 40 51 42 N | 089 40 43 W |
| Dunlap Airport | Airport | 133 | Lawrence | 38 43 30 N | 087 44 38 W |
| Dunlap Fire Station | Building | 221 | Peoria | 40 51 51 N | 089 40 40 W |
| Dunlap Grade School | School | 219 | Peoria | 40 51 32 N | 089 40 26 W |
| Dunlap High School | School | 216 | Peoria | 40 51 18 N | 089 40 33 W |
| Dunlap Lake | Reservoir | 160 | Madison | 38 48 32 N | 089 56 15 W |
| Dunlap Lake Dam | Dam | 160 | Madison | 38 48 32 N | 089 56 15 W |
| Dunlap Middle School | School | 214 | Peoria | 40 51 06 N | 089 40 28 W |
| Dunlap Post Office | Post Office | 221 | Peoria | 40 51 44 N | 089 40 32 W |