Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Whitley Creek Recreation Area | Park | 192 | Moultrie | 39 32 28 N | 088 37 35 W |
| Whitlock Cemetery | Cemetery | 158 | Greene | 39 15 42 N | 090 15 30 W |
| Whitlock Cemetery | Cemetery | 185 | Morgan | 39 32 04 N | 090 11 25 W |
| Whitlock Cemetery | Cemetery | 189 | Vermilion | 39 56 30 N | 087 32 42 W |
| Whitlock Park | Park | 233 | DuPage | 41 48 51 N | 087 59 36 W |
| Whitman Laboratory | Building | 180 | Cook | 41 47 28 N | 087 36 11 W |
| Whitman Park | Park | 191 | Cook | 41 34 02 N | 087 34 23 W |
| Whitman School | School | 198 | Cook | 42 08 15 N | 087 54 32 W |
| Whitmore Cemetery | Cemetery | 271 | DeKalb | 41 57 10 N | 088 45 13 W |
| Whitney | Locale | 142 | Adams | 39 47 15 N | 091 22 01 W |
| Whitney Cemetery | Cemetery | 249 | Kane | 41 56 50 N | 088 24 12 W |
| Whitney Elementary School | School | 181 | Cook | 41 50 24 N | 087 43 31 W |
| Whitney Lake | Lake | 134 | Marshall | 41 06 11 N | 089 21 55 W |
| Whitney M Young Magnet High School | School | 181 | Cook | 41 52 41 N | 087 39 49 W |
| Whitney School (historical) | School | 252 | Henry | 41 11 37 N | 089 55 00 W |
| Whitney Slough | Gut | 144 | Hancock | 40 16 54 N | 091 27 00 W |
| Whitsett School (historical) | School | 126 | White | 38 11 25 N | 088 04 23 W |
| Whittaker Park | Park | 213 | DuPage | 41 44 53 N | 087 55 11 W |
| Whittemore School (historical) | School | 203 | Kankakee | 41 02 22 N | 087 37 24 W |
| Whitten | Building | 240 | McLean | 40 30 24 N | 088 59 39 W |
| Whitten Branch | Stream | | Tazewell | 40 28 28 N | 089 19 06 W |
| Whitten School (historical) | School | 197 | Fayette | 39 09 06 N | 089 12 34 W |
| Whitten School (historical) | School | 223 | Peoria | 40 52 25 N | 089 55 34 W |
| Whittenberg School (historical) | School | 171 | Washington | 38 22 31 N | 089 13 59 W |
| Whittier Campus Kerr Middle School | School | 192 | Cook | 41 39 21 N | 087 41 03 W |
| Whittier Early Childhood Center | School | 201 | Lake | 42 22 20 N | 087 51 17 W |
| Whittier Elementary School | School | 180 | Cook | 41 51 02 N | 087 40 24 W |
| Whittier Elementary School | School | 196 | Cook | 41 54 45 N | 087 53 30 W |
| Whittier Elementary School | School | 220 | DuPage | 41 47 32 N | 087 59 52 W |
| Whittier Elementary School | School | 227 | DuPage | 41 51 26 N | 088 06 31 W |
| Whittier Primary School | School | 183 | Peoria | 40 41 44 N | 089 37 10 W |
| Whittier School | School | 189 | Cook | 41 53 56 N | 087 46 57 W |
| Whittier School | School | 184 | Cook | 41 36 51 N | 087 39 07 W |
| Whittington | Populated Place | 135 | Franklin | 38 05 21 N | 088 54 10 W |
| Whittington Oil Field | Oilfield | 140 | Franklin | 38 03 57 N | 088 54 12 W |
| Whittington School (historical) | School | 195 | Bureau | 41 31 38 N | 089 45 24 W |
| Whittler School | School | 189 | Cook | 41 53 57 N | 087 46 56 W |
| Whittleton School (historical) | School | 229 | Pike | 39 41 26 N | 091 00 39 W |
| Whitton | Populated Place | 187 | Jo Daviess | 42 13 33 N | 090 18 30 W |
| WHMS-FM (Champaign) | Tower | 222 | Champaign | 40 05 10 N | 088 14 55 W |
| Who So Ever Will Let Him Come Missionary Baptist Church | Church | 182 | Cook | 41 47 45 N | 087 38 41 W |
| WHOI-TV (Peoria) | Tower | 209 | Tazewell | 40 39 11 N | 089 35 14 W |
| Whole Truth Tabernacle | Church | 209 | Rock Island | 41 29 38 N | 090 24 12 W |
| Whoopie Cat Dam | Dam | 123 | Hardin | 37 29 00 N | 088 19 36 W |
| Whoopie Cat Lake | Reservoir | 123 | Hardin | 37 29 00 N | 088 19 36 W |
| Whoople Cat Lake | Reservoir | 116 | Hardin | 37 28 30 N | 088 19 47 W |
| Whosoever Will Christway Bible Church | Church | 182 | Cook | 41 51 44 N | 087 43 09 W |
| WHOW-AM (Clinton) | Tower | 219 | De Witt | 40 05 43 N | 088 57 51 W |
| WHOW-FM (Clinton) | Tower | 219 | De Witt | 40 05 43 N | 088 57 51 W |
| WHPI-AM (Herrin) | Tower | 119 | Williamson | 37 50 03 N | 089 01 37 W |
| WHPK-FM (Chicago) | Tower | 180 | Cook | 41 47 40 N | 087 35 55 W |
| WHPO-FM (Hoopeston) | Tower | 217 | Vermilion | 40 28 36 N | 087 41 36 W |
| WHSD-FM (Hinsdale) | Tower | 223 | DuPage | 41 47 18 N | 087 56 02 W |
| WHZT-FM (Mahomet) | Tower | 235 | Champaign | 40 13 27 N | 088 17 56 W |
| WIAI-FM (Danville) | Tower | 195 | Vermilion | 40 08 52 N | 087 46 20 W |
| WIBI-FM (Carlinville) | Tower | 190 | Macoupin | 39 20 58 N | 089 48 16 W |
| WIBV Radio Station | Tower | 148 | St. Clair | 38 28 27 N | 089 59 05 W |
| WIBV-AM (Belleville) | Tower | 147 | St. Clair | 38 27 28 N | 089 57 43 W |
| WICD-TV (Champaign) | Tower | 194 | Vermilion | 40 04 11 N | 087 54 45 W |
| Wichert | Populated Place | 193 | Kankakee | 41 03 26 N | 087 42 15 W |
| Wichert Church | Church | 193 | Kankakee | 41 03 28 N | 087 43 10 W |
| Wichman Airport | Airport | 202 | Iroquois | 40 36 58 N | 087 36 51 W |
| Wicker Park | Park | 181 | Cook | 41 54 27 N | 087 40 37 W |
| Wicker Park Lutheran Church | Church | 182 | Cook | 41 54 30 N | 087 40 49 W |
| Wicker Park School | School | 182 | Cook | 41 54 24 N | 087 40 42 W |
| Wickham Creek | Stream | | Stephenson | 42 18 08 N | 089 28 02 W |
| WICS-TV (Springfield) | Tower | 180 | Sangamon | 39 48 15 N | 089 27 40 W |
| Wideawake School (historical) | School | 208 | Vermilion | 40 01 05 N | 087 54 37 W |
| Wider Range School (historical) | School | 171 | Madison | 38 50 38 N | 089 43 36 W |
| Wideview | Populated Place | 257 | Kane | 41 56 19 N | 088 22 54 W |
| Widicus Family Cemetery | Cemetery | 155 | Madison | 38 39 31 N | 089 52 10 W |
| Widner Lake | Reservoir | 230 | Iroquois | 40 30 54 N | 088 06 00 W |
| Widner Lake Dam | Dam | 230 | Iroquois | 40 30 54 N | 088 06 00 W |
| Wieboldt Hall | Building | 180 | Cook | 41 53 46 N | 087 37 07 W |
| Wiedeman Hollow | Valley | | Saline | 37 40 10 N | 088 23 43 W |
| Wienke School (historical) | School | 266 | McHenry | 42 10 32 N | 088 15 28 W |
| Wierzba Park | Park | 189 | Cook | 41 44 56 N | 087 48 13 W |
| Wieseman-Ruehnoll Cemetery | Cemetery | 172 | Madison | 38 58 28 N | 089 54 41 W |
| WIFR-TV (Freeport) | Tower | 250 | Winnebago | 42 17 48 N | 089 10 15 W |
| Wiggens Cemetery | Cemetery | 183 | Cass | 39 55 51 N | 090 19 25 W |
| Wiggins School (historical) | School | 140 | Saline | 37 51 50 N | 088 32 44 W |
| Wiggins School (historical) | School | 181 | Sangamon | 39 53 42 N | 089 40 22 W |
| Wiggins Slough | Lake | 157 | Sangamon | 39 52 32 N | 089 38 40 W |
| Wight School | School | 227 | Winnebago | 42 15 46 N | 089 04 30 W |
| Wightman Lake | Lake | 134 | Marshall | 41 00 48 N | 089 25 59 W |
| Wigwam Hollow | Valley | | McDonough | 40 28 35 N | 090 41 56 W |
| WIHN-FM (Normal) | Tower | 235 | McLean | 40 28 34 N | 089 02 02 W |
| Wike Chapel School (historical) | School | 139 | Pike | 39 37 55 N | 091 11 11 W |
| Wil-O-Way Commons Park | Park | 206 | DuPage | 41 46 34 N | 088 10 07 W |
| Wil-O-Way Park | Park | 211 | DuPage | 41 46 13 N | 088 10 47 W |
| Wilbanks Cemetery | Cemetery | 147 | Jefferson | 38 09 24 N | 088 44 59 W |
| Wilbern | Populated Place | 168 | Marshall | 40 56 48 N | 089 19 25 W |
| Wilberton | Populated Place | 175 | Fayette | 38 52 46 N | 088 57 05 W |
| Wilberton School (historical) | School | 174 | Fayette | 38 52 47 N | 088 57 12 W |
| Wilborn Creek | Stream | | Shelby | 39 34 41 N | 088 43 42 W |
| Wilborn Creek Recreation Area | Park | 196 | Moultrie | 39 34 10 N | 088 42 45 W |
| Wilbur Heights | Populated Place | 227 | Champaign | 40 08 33 N | 088 14 08 W |
| Wilbur School (historical) | School | 229 | Ogle | 42 06 18 N | 089 09 10 W |
| Wilbur Thompson Airport | Airport | 240 | Lee | 41 48 26 N | 089 02 52 W |
| Wilbur Trimpe Junior High School | School | 159 | Madison | 38 54 31 N | 090 03 13 W |
| Wilbur Wright College | School | 190 | Cook | 41 56 34 N | 087 46 38 W |
| Wilburn Park | Park | 207 | Christian | 39 23 34 N | 089 04 12 W |
| Wilco Career Center | School | 203 | Will | 41 36 05 N | 088 05 33 W |
| Wilcox Cemetery | Cemetery | 195 | Sangamon | 39 44 41 N | 089 57 05 W |
| Wilcox Cemetery | Cemetery | 182 | Sangamon | 39 50 38 N | 089 14 49 W |
| Wilcox Church (historical) | Church | 136 | Clay | 38 38 10 N | 088 18 46 W |
| Wilcox Elementary School | School | 180 | Sangamon | 39 49 40 N | 089 36 53 W |
| Wilcox Lake | Lake | 136 | Mason | 40 04 16 N | 090 15 06 W |
| Wilcox School (historical) | School | 222 | Kendall | 41 39 14 N | 088 16 45 W |
| Wilcox School (historical) | School | 227 | McLean | 40 39 12 N | 088 53 24 W |