Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wilson School (historical) | School | 164 | Crawford | 38 58 59 N | 087 46 35 W |
| Wilson School (historical) | School | 234 | Henry | 41 16 17 N | 090 04 06 W |
| Wilson School (historical) | School | 170 | Jasper | 39 04 06 N | 088 10 01 W |
| Wilson School (historical) | School | 271 | Kane | 42 03 15 N | 088 21 18 W |
| Wilson School (historical) | School | 196 | La Salle | 41 26 25 N | 088 57 12 W |
| Wilson School (historical) | School | 176 | Marion | 38 42 53 N | 088 50 43 W |
| Wilson School (historical) | School | 244 | Marshall | 41 07 38 N | 089 37 11 W |
| Wilson School (historical) | School | 334 | McHenry | 42 27 29 N | 088 33 36 W |
| Wilson School (historical) | School | 239 | Peoria | 40 54 04 N | 089 44 06 W |
| Wilson School (historical) | School | 183 | Pike | 39 43 23 N | 090 41 34 W |
| Wilson School (historical) | School | 148 | Richland | 38 46 24 N | 088 07 34 W |
| Wilson School (historical) | School | 129 | Wayne | 38 34 41 N | 088 16 31 W |
| Wilson School (historical) | School | 198 | Will | 41 34 24 N | 088 07 21 W |
| Wilson School (historical) | School | 160 | Williamson | 37 43 22 N | 088 50 11 W |
| Wilson School (historical) | School | 257 | Winnebago | 42 28 40 N | 089 13 32 W |
| Wilson Woods | Woods | 198 | Cook | 41 30 27 N | 087 38 32 W |
| Wilson-Divers Cemetery | Cemetery | 204 | St. Clair | 38 26 21 N | 090 09 13 W |
| Wilsonburg (historical) | Populated Place | 138 | Richland | 38 45 35 N | 088 14 20 W |
| Wilsons Island | Island | 131 | Morgan | 39 51 03 N | 090 34 47 W |
| Wilsonville | Populated Place | 196 | Macoupin | 39 04 15 N | 089 51 22 W |
| Wiltberger School (historical) | School | 271 | DeKalb | 41 49 14 N | 088 46 23 W |
| Wilton | Populated Place | 211 | Will | 41 22 46 N | 087 56 03 W |
| Wilton Center | Populated Place | 202 | Will | 41 21 05 N | 087 57 35 W |
| Wilton Center Cemetery | Cemetery | 202 | Will | 41 20 37 N | 087 57 36 W |
| Wilton Center Elementary School | School | 201 | Will | 41 21 03 N | 087 57 37 W |
| Wilton Enterprises School | School | 189 | Cook | 41 41 05 N | 087 38 37 W |
| Wiltse School (historical) | School | 193 | Kankakee | 41 06 31 N | 087 40 51 W |
| Wily Wake | Lake | 137 | Mason | 40 05 25 N | 090 07 43 W |
| WILY-AM (Centralia) | Tower | 149 | Marion | 38 34 44 N | 089 06 46 W |
| Wiman Park | Park | 207 | Rock Island | 41 29 02 N | 090 26 46 W |
| Wimmer Cemetery | Cemetery | 184 | Sangamon | 39 34 54 N | 089 43 14 W |
| Wimmer Medical Plaza | Hospital | 213 | Cook | 42 00 14 N | 088 00 57 W |
| Wimple Park | Park | 197 | Douglas | 39 47 03 N | 088 16 01 W |
| Win-Mil Shopping Center | Locale | 220 | Lake | 42 17 43 N | 087 57 25 W |
| Winans School (historical) | School | 219 | Stark | 41 05 01 N | 089 57 53 W |
| Winbigler Hall | Building | 228 | Warren | 40 54 53 N | 090 38 11 W |
| Winchester | Populated Place | 165 | Scott | 39 37 47 N | 090 27 22 W |
| Winchester Airport | Airport | 203 | Hancock | 40 34 55 N | 091 21 31 W |
| Winchester Cemetery | Cemetery | 156 | Jackson | 37 41 32 N | 089 14 49 W |
| Winchester Cemetery | Cemetery | 156 | Scott | 37 41 32 N | 089 14 49 W |
| Winchester Christian School | School | 165 | Scott | 39 38 13 N | 090 27 40 W |
| Winchester Elementary School | School | 162 | Scott | 39 37 36 N | 090 27 38 W |
| Winchester Fellowship Church | Church | 165 | Scott | 39 38 13 N | 090 27 40 W |
| Winchester High School | School | 162 | Scott | 39 37 39 N | 090 27 34 W |
| Winchester Historic District | Park | 165 | Scott | 39 37 47 N | 090 27 22 W |
| Winchester Number 1 Election Precinct | Civil | 178 | Scott | 39 39 40 N | 090 24 56 W |
| Winchester Number 2 Election Precinct | Civil | 171 | Scott | 39 39 58 N | 090 28 06 W |
| Winchester Number 3 Election Precinct | Civil | 162 | Scott | 39 36 56 N | 090 26 13 W |
| Winchester-Hood Garden Homes (subdivision) | Populated Place | 187 | Cook | 41 59 37 N | 087 40 40 W |
| Windblown Bottoms Duck Club (historical) | Locale | 140 | Putnam | 41 17 15 N | 089 19 53 W |
| Windemere Senior Health Center | Hospital | 180 | Cook | 41 47 37 N | 087 35 04 W |
| Windenoak | Populated Place | 238 | Kane | 41 51 55 N | 088 27 58 W |
| Winderwere Park | Park | 213 | Will | 41 29 56 N | 087 57 39 W |
| Windfall Creek | Stream | | Vermilion | 40 12 11 N | 087 44 04 W |
| Windfall Lake | Reservoir | 200 | Vermilion | 40 13 12 N | 087 43 42 W |
| Windfall Lake Dam | Dam | 199 | Vermilion | 40 13 12 N | 087 43 39 W |
| Windfall Prairie Nature Preserve | Park | 202 | Vermilion | 40 12 59 N | 087 44 45 W |
| Winding Creek Commons Park | Park | 233 | DuPage | 41 58 31 N | 088 10 37 W |
| Winding Creek Park | Park | 205 | DuPage | 41 44 26 N | 088 08 20 W |
| Winding Creek Park | Park | 258 | McHenry | 42 11 48 N | 088 20 21 W |
| Windland School (historical) | School | 125 | Wayne | 38 20 55 N | 088 14 11 W |
| Windmill School (historical) | School | 249 | Knox | 41 01 09 N | 090 10 07 W |
| Windmont Park | Park | 252 | Henry | 41 13 42 N | 089 56 10 W |
| Windridge Cemetery | Cemetery | 256 | McHenry | 42 13 31 N | 088 12 55 W |
| Windsor | Populated Place | 214 | Shelby | 39 26 27 N | 088 35 41 W |
| Windsor Baptist Church | Church | 222 | Winnebago | 42 19 30 N | 089 02 44 W |
| Windsor Cemetery | Cemetery | 212 | Shelby | 39 26 43 N | 088 36 10 W |
| Windsor Christian Church | Church | 215 | Shelby | 39 26 21 N | 088 35 45 W |
| Windsor Elementary School | School | 206 | Cook | 42 05 03 N | 087 58 00 W |
| Windsor Elementary School | School | 214 | Shelby | 39 26 36 N | 088 35 37 W |
| Windsor Elementary School | School | 222 | Winnebago | 42 19 28 N | 089 02 51 W |
| Windsor High School | School | 212 | Shelby | 39 26 33 N | 088 36 08 W |
| Windsor Lake | Lake | 220 | Winnebago | 42 19 44 N | 089 01 52 W |
| Windsor Park (subdivision) | Populated Place | 179 | Cook | 41 45 08 N | 087 33 10 W |
| Windsor Park Golf Course (historical) | Locale | 178 | Cook | 41 45 21 N | 087 33 48 W |
| Windsor Park Lutheran Church | Church | 179 | Cook | 41 45 25 N | 087 33 37 W |
| Windsor Parkway Park | Park | 207 | Cook | 42 04 41 N | 087 57 51 W |
| Windsor Square Shopping Center | Locale | 238 | Peoria | 40 46 38 N | 089 37 15 W |
| Windsor United Methodist Church | Church | 215 | Shelby | 39 26 24 N | 088 35 51 W |
| Windwood Park | Park | 267 | McHenry | 42 14 02 N | 088 16 50 W |
| Windy City Beach Camp Resort | Locale | 214 | Will | 41 32 55 N | 087 48 32 W |
| Windy Ridge School (historical) | School | 217 | Warren | 40 49 15 N | 090 34 33 W |
| Wine Hill | Populated Place | 177 | Randolph | 37 56 56 N | 089 40 28 W |
| Wine Hill Election Precinct | Civil | 149 | Randolph | 37 55 25 N | 089 39 11 W |
| Winegar Spring | Spring | 138 | Pike | 39 43 45 N | 090 39 22 W |
| Winemiller Cemetery | Cemetery | 133 | Franklin | 38 05 02 N | 088 54 10 W |
| Wines Branch | Stream | | Greene | 39 11 50 N | 090 26 14 W |
| Winfield | Populated Place | 235 | DuPage | 41 51 42 N | 088 09 39 W |
| Winfield Community United Methodist Church | Church | 220 | DuPage | 41 51 55 N | 088 09 06 W |
| Winfield Mounds County Forest Preserve | Forest | 222 | DuPage | 41 52 27 N | 088 10 13 W |
| Winfield Mounds County Forest Preserve | Park | 226 | DuPage | 41 53 05 N | 088 09 49 W |
| Winfield Park | Park | 219 | Cook | 42 08 40 N | 087 59 10 W |
| Winfield Post Office | Post Office | 220 | DuPage | 41 52 16 N | 088 09 33 W |
| Wing | Populated Place | 201 | Livingston | 40 49 10 N | 088 24 04 W |
| Wing Island | Island | 129 | Greene | 39 24 39 N | 090 37 05 W |
| Wing It School | School | 184 | Cook | 41 47 32 N | 087 45 15 W |
| Wing Park | Park | 236 | Kane | 42 03 12 N | 088 18 20 W |
| Wing Park Manor Shopping Center | Locale | 245 | Kane | 42 02 53 N | 088 18 39 W |
| Wing School | School | 225 | Kane | 42 02 32 N | 088 16 53 W |
| Wingard School | School | 204 | Vermilion | 39 59 45 N | 087 35 25 W |
| Wingate Prairie Nature Preserve | Park | 274 | McHenry | 42 15 14 N | 088 18 50 W |
| Wingerter School (historical) | School | 198 | Kankakee | 41 03 04 N | 087 40 29 W |
| WINI-AM (Murphysboro) | Tower | 118 | Jackson | 37 45 30 N | 089 14 02 W |
| Winkel | Populated Place | 158 | Tazewell | 40 20 56 N | 089 37 53 W |
| Winkeman School (historical) | School | 192 | Saline | 37 36 49 N | 088 32 26 W |
| Winkle | Populated Place | 171 | Perry | 38 09 00 N | 089 29 19 W |
| Winkleblack Cemetery | Cemetery | 210 | Coles | 39 32 42 N | 088 07 37 W |
| Winkleblack School (historical) | School | 208 | Coles | 39 32 42 N | 088 07 45 W |
| Winkleman Cemetery | Cemetery | 129 | Saline | 37 46 30 N | 088 38 00 W |
| Winkler Cemetery | Cemetery | 215 | Woodford | 40 48 22 N | 089 28 01 W |