Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Walnut Chapel | Church | 173 | Clark | 39 10 30 N | 087 58 35 W |
| Walnut Corner Cemetery | Cemetery | 208 | Vermilion | 40 13 18 N | 087 33 17 W |
| Walnut Corner Church of Christ | Church | 206 | Vermilion | 40 13 14 N | 087 33 18 W |
| Walnut Corner Shopping Center | Locale | 244 | Cook | 42 00 46 N | 088 12 09 W |
| Walnut Creek | Stream | | Bureau | 41 30 41 N | 089 41 49 W |
| Walnut Creek | Stream | | Fayette | 38 57 46 N | 088 54 22 W |
| Walnut Creek | Stream | | Peoria | 40 46 26 N | 089 56 02 W |
| Walnut Creek | Stream | | Scott | 39 38 53 N | 090 36 30 W |
| Walnut Creek | Stream | | Stark | 40 57 35 N | 089 58 35 W |
| Walnut Creek | Stream | | Woodford | 40 37 32 N | 089 14 22 W |
| Walnut Creek Ditch | Canal | 144 | Pike | 39 43 40 N | 091 12 60 W |
| Walnut Creek School (historical) | School | 160 | Pike | 39 43 42 N | 091 11 38 W |
| Walnut Creek Settling Basin | Basin | 141 | Pike | 39 43 22 N | 091 13 50 W |
| Walnut Dell School (historical) | School | 233 | Ford | 40 31 44 N | 088 12 50 W |
| Walnut Fork | Stream | | Adams | 39 54 56 N | 091 00 21 W |
| Walnut Greens Golf Course | Locale | 240 | Cook | 42 02 44 N | 088 07 51 W |
| Walnut Grove | Populated Place | 216 | McDonough | 40 36 58 N | 090 33 33 W |
| Walnut Grove | Populated Place | 139 | Putnam | 41 10 36 N | 089 21 39 W |
| Walnut Grove Cemetery | Cemetery | 257 | Bureau | 41 17 04 N | 089 42 51 W |
| Walnut Grove Cemetery | Cemetery | 156 | Franklin | 38 06 06 N | 088 43 27 W |
| Walnut Grove Cemetery | Cemetery | 201 | Henderson | 40 46 54 N | 090 52 00 W |
| Walnut Grove Cemetery | Cemetery | 233 | Knox | 41 06 08 N | 090 09 31 W |
| Walnut Grove Cemetery | Cemetery | 203 | Macon | 39 48 12 N | 088 58 53 W |
| Walnut Grove Cemetery | Cemetery | 201 | McDonough | 40 32 42 N | 090 38 23 W |
| Walnut Grove Cemetery | Cemetery | 179 | Morgan | 39 48 05 N | 090 18 27 W |
| Walnut Grove Cemetery | Cemetery | 152 | Richland | 38 35 58 N | 087 59 57 W |
| Walnut Grove Cemetery | Cemetery | 120 | White | 38 00 38 N | 088 14 42 W |
| Walnut Grove Church | Church | 209 | Coles | 39 37 23 N | 088 13 59 W |
| Walnut Grove Church | Church | 130 | Johnson | 37 35 48 N | 088 44 29 W |
| Walnut Grove Church | Church | 152 | Richland | 38 35 58 N | 087 59 58 W |
| Walnut Grove Church | Church | 137 | Saline | 37 40 22 N | 088 33 53 W |
| Walnut Grove Church | Church | 135 | Union | 37 31 30 N | 089 18 30 W |
| Walnut Grove Church | Church | 120 | White | 38 00 36 N | 088 14 42 W |
| Walnut Grove Church (historical) | Church | 155 | Franklin | 38 06 07 N | 088 43 29 W |
| Walnut Grove Church (historical) | Church | 168 | Greene | 39 17 53 N | 090 16 03 W |
| Walnut Grove College (historical) | School | 207 | Macon | 39 54 06 N | 088 48 10 W |
| Walnut Grove School | School | 123 | Monroe | 38 22 18 N | 090 19 58 W |
| Walnut Grove School (historical) | School | 257 | Bureau | 41 16 59 N | 089 43 00 W |
| Walnut Grove School (historical) | School | 180 | Cass | 39 54 06 N | 090 08 42 W |
| Walnut Grove School (historical) | School | 202 | Coles | 39 30 26 N | 088 13 28 W |
| Walnut Grove School (historical) | School | 234 | Edgar | 39 32 26 N | 087 53 19 W |
| Walnut Grove School (historical) | School | 209 | Edgar | 39 38 47 N | 087 46 24 W |
| Walnut Grove School (historical) | School | 180 | Fayette | 38 59 06 N | 088 53 58 W |
| Walnut Grove School (historical) | School | 167 | Greene | 39 17 29 N | 090 16 40 W |
| Walnut Grove School (historical) | School | 201 | Hancock | 40 21 36 N | 091 18 47 W |
| Walnut Grove School (historical) | School | 206 | Johnson | 37 35 30 N | 088 44 10 W |
| Walnut Grove School (historical) | School | 200 | Macon | 39 48 12 N | 088 58 56 W |
| Walnut Grove School (historical) | School | 180 | Menard | 39 58 35 N | 089 36 09 W |
| Walnut Grove School (historical) | School | 197 | Mercer | 41 07 17 N | 090 48 11 W |
| Walnut Grove School (historical) | School | 183 | Montgomery | 39 02 55 N | 089 25 35 W |
| Walnut Grove School (historical) | School | 183 | Morgan | 39 48 02 N | 090 18 07 W |
| Walnut Grove School (historical) | School | 150 | Pike | 39 28 45 N | 090 55 23 W |
| Walnut Grove School (historical) | School | 207 | Pike | 39 40 56 N | 090 45 40 W |
| Walnut Grove School (historical) | School | 179 | Pope | 37 24 26 N | 088 41 37 W |
| Walnut Grove School (historical) | School | 138 | Richland | 38 48 18 N | 088 14 26 W |
| Walnut Grove School (historical) | School | 193 | Sangamon | 39 32 43 N | 089 43 47 W |
| Walnut Grove School (historical) | School | 311 | Stephenson | 42 29 26 N | 089 26 22 W |
| Walnut Grove School (historical) | School | 201 | Vermilion | 40 02 51 N | 087 53 33 W |
| Walnut Grove School (historical) | School | 133 | White | 38 01 03 N | 088 14 13 W |
| Walnut Grove School (historical) | School | 226 | Woodford | 40 40 36 N | 089 04 22 W |
| Walnut Grove United Methodist Church | Church | 216 | McDonough | 40 36 48 N | 090 33 35 W |
| Walnut Grove Youth Group Camping Area | Locale | 256 | Jo Daviess | 42 26 53 N | 090 02 55 W |
| Walnut Hill | Populated Place | 173 | Marion | 38 28 38 N | 089 02 36 W |
| Walnut Hill | Summit | 197 | Logan | 39 58 40 N | 089 32 46 W |
| Walnut Hill Cemetery | Cemetery | 197 | Logan | 39 58 38 N | 089 32 49 W |
| Walnut Hill Cemetery | Cemetery | 153 | St. Clair | 38 30 08 N | 089 58 20 W |
| Walnut Hill Church | Church | 164 | Williamson | 37 42 03 N | 088 48 13 W |
| Walnut Hill School (historical) | School | 181 | Christian | 39 36 23 N | 089 23 13 W |
| Walnut Hill School (historical) | School | 132 | Clay | 38 36 39 N | 088 26 17 W |
| Walnut Hill School (historical) | School | 180 | Greene | 39 18 43 N | 090 28 26 W |
| Walnut Hill School (historical) | School | 134 | Wayne | 38 26 14 N | 088 17 23 W |
| Walnut Park | Park | 251 | Cook | 42 01 49 N | 088 11 13 W |
| Walnut Park | Park | 220 | Kane | 41 50 36 N | 088 19 03 W |
| Walnut Point State Park | Park | 198 | Douglas | 39 41 52 N | 088 02 16 W |
| Walnut Point State Park Lake | Reservoir | 197 | Douglas | 39 41 42 N | 088 02 00 W |
| Walnut Point State Park Lake Dam | Dam | 197 | Douglas | 39 41 42 N | 088 02 00 W |
| Walnut Pond | Reservoir | 233 | Ogle | 42 04 24 N | 089 13 48 W |
| Walnut Pond Dam | Dam | 233 | Ogle | 42 04 24 N | 089 13 48 W |
| Walnut Prairie | Populated Place | 147 | Clark | 39 14 24 N | 087 39 58 W |
| Walnut Prairie Cemetery | Cemetery | 138 | Clark | 39 13 45 N | 087 36 00 W |
| Walnut Ridge Cemetery | Cemetery | 189 | Cass | 39 57 42 N | 090 12 14 W |
| Walnut Ridge Cemetery | Cemetery | 186 | Menard | 40 02 52 N | 089 36 39 W |
| Walnut Ridge School (historical) | School | 171 | Randolph | 37 58 19 N | 089 50 23 W |
| Walnut Row School (historical) | School | 182 | Menard | 40 02 25 N | 089 44 02 W |
| Walnut School (historical) | School | 143 | Fulton | 40 29 44 N | 089 56 07 W |
| Walnut School (historical) | School | 206 | Hancock | 40 27 22 N | 090 55 53 W |
| Walnut School (historical) | School | 139 | Washington | 38 27 25 N | 089 20 21 W |
| Walnut Special Ditch | Canal | 192 | Bureau | 41 32 20 N | 089 39 32 W |
| Walnut United Methodist Church | Church | 216 | Bureau | 41 33 23 N | 089 35 33 W |
| Walpole | Populated Place | 134 | Hamilton | 37 56 12 N | 088 33 17 W |
| Walpole Airport | Airport | 241 | Henry | 42 14 30 N | 088 40 00 W |
| Walser Creek | Stream | | Edwards | 38 28 23 N | 087 56 56 W |
| Walsh | Populated Place | 146 | Randolph | 38 05 22 N | 089 51 03 W |
| Walsh Election Precinct | Civil | 140 | Randolph | 38 05 18 N | 089 51 31 W |
| Walsh Elementary School | School | 188 | Cook | 41 47 19 N | 087 48 32 W |
| Walsh Elementary School | School | 180 | Cook | 41 51 18 N | 087 38 51 W |
| Walsh Elementary School | School | 203 | Will | 41 36 15 N | 088 02 07 W |
| Walsh Park | Park | 182 | Cook | 41 54 49 N | 087 40 06 W |
| Walsh Park | Park | 150 | La Salle | 41 21 42 N | 088 49 57 W |
| Walsh Park | Park | 227 | McHenry | 42 20 40 N | 088 15 59 W |
| Walshville | Populated Place | 188 | Montgomery | 39 04 15 N | 089 37 08 W |
| Walt Williamson Park | Park | 226 | Winnebago | 42 27 18 N | 089 04 14 W |
| Walter Airport | Airport | 271 | DeKalb | 41 52 21 N | 088 43 25 W |
| Walter Cemetery | Cemetery | 123 | White | 37 57 07 N | 088 21 25 W |
| Walter F Coolidge Junior High School | School | 128 | Madison | 38 43 14 N | 090 07 26 W |
| Walter F Fierke Education Center | School | 213 | Cook | 41 36 33 N | 087 46 44 W |
| Walter H Dyett Middle School | School | 181 | Cook | 41 48 04 N | 087 36 43 W |
| Walter Klehm Hall | Building | 210 | Coles | 39 28 42 N | 088 10 29 W |
| Walter Park | Park | 236 | DuPage | 41 55 41 N | 088 09 39 W |
| Walter R Sundling Junior High School | School | 229 | Cook | 42 07 47 N | 088 03 04 W |