Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wilcox Townhall | Building | 226 | Hancock | 40 19 59 N | 091 23 34 W |
| Wilcox-Coon Cemetery | Cemetery | 224 | McLean | 40 39 23 N | 088 54 14 W |
| Wild Creek | Stream | | Whiteside | 41 51 33 N | 089 38 04 W |
| Wild Goose School (historical) | School | 139 | Fulton | 40 18 43 N | 090 08 34 W |
| Wild Rose Elementary School | School | 242 | Kane | 41 55 27 N | 088 20 05 W |
| Wild Rose School (historical) | School | 117 | Wayne | 38 16 16 N | 088 11 31 W |
| Wildcat Bluff | Cliff | 119 | Massac | 37 22 25 N | 088 55 36 W |
| Wildcat Bog | Swamp | 150 | La Salle | 41 19 32 N | 088 44 32 W |
| Wildcat Canyon | Valley | | La Salle | 41 19 01 N | 088 58 57 W |
| Wildcat Cemetery | Cemetery | 162 | Johnson | 37 22 08 N | 088 54 26 W |
| Wildcat Creek | Stream | | Fulton | 40 34 50 N | 089 52 54 W |
| Wildcat Creek | Stream | | Hancock | 40 32 42 N | 091 03 49 W |
| Wildcat Creek | Stream | | Mercer | 41 08 23 N | 090 51 58 W |
| Wildcat Creek | Stream | | Piatt | 40 01 18 N | 088 37 30 W |
| Wildcat Ditch | Canal | 136 | Fayette | 38 49 02 N | 089 10 01 W |
| Wildcat Ditch | Canal | 187 | Henry | 41 32 13 N | 089 53 02 W |
| Wildcat Hills | Range | 197 | Gallatin | 37 42 05 N | 088 20 09 W |
| Wildcat Hollow | Valley | | Calhoun | 39 22 01 N | 090 47 46 W |
| Wildcat Lake | Lake | 125 | Clinton | 38 28 29 N | 089 28 33 W |
| Wildcat Lake | Lake | 136 | Fayette | 38 49 54 N | 089 09 58 W |
| Wildcat School (historical) | School | 239 | Lee | 41 52 00 N | 089 31 08 W |
| Wildcat School (historical) | School | 205 | Piatt | 40 01 03 N | 088 37 34 W |
| Wildcat School (historical) | School | 125 | White | 38 11 39 N | 088 21 13 W |
| Wildcat Slough | Stream | | Champaign | 40 16 44 N | 088 21 03 W |
| Wildcat Springs Park | Park | 160 | Hancock | 40 24 14 N | 091 21 01 W |
| Wilder Field | Park | 233 | McLean | 40 29 41 N | 088 59 21 W |
| Wilder Park | Park | 212 | DuPage | 41 53 45 N | 087 56 36 W |
| Wilder Park | Park | 204 | Kane | 41 45 48 N | 088 18 51 W |
| Wilder-Waite Elementary School | School | 231 | Peoria | 40 48 36 N | 089 38 09 W |
| Wilderman | Populated Place | 152 | St. Clair | 38 28 25 N | 089 56 21 W |
| Wilderman Cemetery | Cemetery | 172 | St. Clair | 38 27 13 N | 089 55 12 W |
| Wildermuth School (historical) | School | 219 | Henry | 41 23 49 N | 090 13 18 W |
| Wilderness Campground | Locale | 186 | La Salle | 41 27 05 N | 088 42 23 W |
| Wilderness Lake | Lake | 226 | McHenry | 42 19 38 N | 088 13 46 W |
| Wilderness Lake Day Use Area | Locale | 231 | McHenry | 42 19 29 N | 088 13 40 W |
| Wilderness Park | Park | 223 | DuPage | 41 56 03 N | 088 01 34 W |
| Wildrose | Populated Place | 238 | Kane | 41 55 39 N | 088 19 56 W |
| Wildrose Valley (subdivision) | Populated Place | 216 | Kane | 41 55 54 N | 088 19 28 W |
| Wildwind Lake | Lake | 207 | Woodford | 40 49 07 N | 089 27 05 W |
| Wildwood | Populated Place | 247 | Lake | 42 20 34 N | 087 59 53 W |
| Wildwood Baptist Church | Church | 205 | Rock Island | 41 32 58 N | 090 21 09 W |
| Wildwood Elementary School | School | 189 | Cook | 42 00 26 N | 087 46 44 W |
| Wildwood Lake | Reservoir | 166 | Marshall | 41 04 48 N | 089 17 06 W |
| Wildwood Lake Dam | Dam | 178 | Marshall | 41 04 46 N | 089 17 13 W |
| Wildwood Park | Park | 204 | Cook | 42 07 04 N | 087 57 27 W |
| Wildwood Park | Park | 189 | Cook | 42 00 27 N | 087 46 48 W |
| Wildwood Park | Park | 216 | Cook | 41 29 35 N | 087 41 27 W |
| Wildwood Park | Park | 198 | Macon | 39 48 46 N | 088 57 38 W |
| Wildwood Presbyterian Church | Church | 243 | Lake | 42 20 55 N | 088 00 10 W |
| Wildwood School | School | 216 | Cook | 41 29 37 N | 087 41 34 W |
| Wildwood Valley | Populated Place | 283 | Kane | 42 03 44 N | 088 22 25 W |
| Wildy Cemetery | Cemetery | 131 | St. Clair | 38 17 47 N | 089 51 50 W |
| Wildy Field | Airport | 125 | St. Clair | 38 16 03 N | 089 53 30 W |
| Wildy Hall | Building | 160 | St. Clair | 38 36 24 N | 089 48 58 W |
| Wiley Brick Cemetery | Cemetery | 231 | Coles | 39 25 41 N | 088 02 44 W |
| Wiley Cemetery | Cemetery | 195 | Fulton | 40 34 31 N | 090 16 32 W |
| Wiley Cemetery | Cemetery | 227 | McLean | 40 34 18 N | 088 37 58 W |
| Wiley Cemetery | Cemetery | 222 | McLean | 40 35 58 N | 088 43 47 W |
| Wiley Creek | Stream | | Kankakee | 41 09 45 N | 087 56 46 W |
| Wiley Elementary School | School | 224 | Champaign | 40 05 58 N | 088 11 57 W |
| Wiley Evangelical Lutheran Church | Church | 195 | Fulton | 40 34 32 N | 090 16 35 W |
| Wiley Library | Building | 195 | Peoria | 40 46 39 N | 089 58 06 W |
| Wiley Park | Park | 262 | Henry | 41 10 09 N | 090 02 56 W |
| Wiley School (historical) | School | 233 | Coles | 39 25 43 N | 088 02 42 W |
| Wiley School (historical) | School | 193 | Fulton | 40 34 56 N | 090 16 36 W |
| Wiley School (historical) | School | 206 | McDonough | 40 28 10 N | 090 35 59 W |
| Wiley Updike Airport | Airport | 196 | Kendall | 41 37 31 N | 088 34 28 W |
| Wilfred Academy of Hair and Beauty Culture | School | 182 | Cook | 41 53 12 N | 087 37 32 W |
| Wilfred Academy of Hair and Beauty Culture | School | 182 | Cook | 41 58 08 N | 087 41 12 W |
| Wilfred Academy of Hair and Beauty Culture | School | 195 | Cook | 41 53 13 N | 087 48 24 W |
| Wilhelm Cemetery | Cemetery | 200 | McDonough | 40 18 54 N | 090 35 44 W |
| Wilhelm K Roentgen School | School | 183 | Cook | 41 52 49 N | 087 42 39 W |
| Wilhelmi Field | Airport | 193 | Will | 41 29 00 N | 088 05 00 W |
| Wilhelmi School (historical) | School | 193 | Will | 41 29 18 N | 088 04 53 W |
| Wilhoit Cemetery | Cemetery | 233 | Edgar | 39 31 04 N | 087 55 26 W |
| Wilke Commons Shopping Center | Locale | 217 | Cook | 42 04 58 N | 088 00 15 W |
| Wilken Airport | Airport | 200 | Iroquois | 40 50 50 N | 088 02 52 W |
| Wilkerson Chapel | Church | 164 | Madison | 38 40 12 N | 089 59 48 W |
| Wilkerson Chapel African Methodist Episcopal Church | Church | 177 | Bond | 38 53 22 N | 089 24 37 W |
| Wilkes Cemetery | Cemetery | 217 | Adams | 40 01 04 N | 091 06 23 W |
| Wilkey Hall | Building | 183 | Peoria | 40 41 55 N | 089 37 05 W |
| Wilkins Cemetery | Cemetery | 198 | Edgar | 39 34 35 N | 087 37 34 W |
| Wilkins Cemetery | Cemetery | 142 | Jackson | 37 36 48 N | 089 12 36 W |
| Wilkins Cemetery | Cemetery | 130 | Massac | 37 15 33 N | 088 40 24 W |
| Wilkins Hall | Building | 240 | McLean | 40 30 43 N | 089 00 01 W |
| Wilkins Lake | Lake | 125 | Clinton | 38 29 36 N | 089 30 18 W |
| Wilkins Park | Park | 181 | Cook | 41 39 29 N | 087 43 54 W |
| Wilkinson | Populated Place | 271 | DeKalb | 42 00 24 N | 088 46 58 W |
| Wilkinson - Renwick Marsh Nature Preserve | Park | 270 | DeKalb | 42 00 24 N | 088 47 21 W |
| Wilkinson Hall | Building | 210 | Kane | 41 45 19 N | 088 20 54 W |
| Wilkinson Island | Island | 109 | Jackson | 37 44 46 N | 089 37 24 W |
| Wilkinson Pond | Reservoir | 164 | Madison | 38 57 18 N | 090 13 54 W |
| Wilkinson Pond Dam | Dam | 164 | Madison | 38 57 18 N | 090 13 54 W |
| Will County | Civil | 213 | Will | 41 26 00 N | 087 58 00 W |
| Will County Administration Building | Building | 165 | Will | 41 31 48 N | 088 04 52 W |
| Will County Baptist Temple | Church | 189 | Will | 41 30 58 N | 088 05 52 W |
| Will County Courthouse | Building | 165 | Will | 41 31 28 N | 088 04 57 W |
| Will County Fairground | Park | 216 | Will | 41 19 33 N | 087 47 50 W |
| Will County Forest Preserve | Park | 212 | Will | 41 21 20 N | 087 56 35 W |
| Will School (historical) | School | 159 | Jackson | 37 51 24 N | 089 30 07 W |
| Will School (historical) | School | 229 | Lee | 41 46 19 N | 089 27 27 W |
| Will Unit School | School | 220 | Will | 41 20 22 N | 087 43 38 W |
| WILL-AM (Urbana) | Tower | 216 | Champaign | 40 04 53 N | 088 14 18 W |
| WILL-FM (Urbana) | Tower | 210 | Piatt | 40 02 18 N | 088 40 10 W |
| WILL-TV (Urbana) | Tower | 210 | Piatt | 40 02 18 N | 088 40 10 W |
| Willadae Farms Airport | Airport | 260 | DeKalb | 42 00 00 N | 088 40 00 W |
| Willard | Populated Place | 99 | Alexander | 37 05 11 N | 089 21 08 W |
| Willard Cemetery | Cemetery | 183 | Pike | 39 31 46 N | 090 44 06 W |
| Willard Elementary School | School | 189 | Cook | 41 54 12 N | 087 49 02 W |
| Willard Elementary School | School | 186 | Cook | 42 04 01 N | 087 43 01 W |