Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Kramer Airport | Airport | 278 | Stephenson | 42 22 30 N | 089 50 45 W |
| Kramm | Locale | 158 | Peoria | 40 45 29 N | 089 46 55 W |
| Krannert Art Museum | Building | 228 | Champaign | 40 06 07 N | 088 13 53 W |
| Krannert Center for the Performing Arts | Building | 222 | Champaign | 40 06 28 N | 088 13 22 W |
| Kranz Forum | Locale | 214 | DuPage | 41 53 47 N | 087 56 44 W |
| Krape Park | Park | 237 | Stephenson | 42 16 36 N | 089 39 00 W |
| Krasowski Park | Park | 182 | Cook | 41 42 07 N | 087 48 48 W |
| Kratzinger Hollow | Valley | | Union | 37 28 02 N | 089 17 11 W |
| Krause Airport | Airport | 254 | Henry | 42 10 47 N | 088 39 02 W |
| Krause Pond | Reservoir | 202 | Bureau | 41 24 36 N | 089 35 12 W |
| Krause Pond Dam | Dam | 202 | Bureau | 41 24 36 N | 089 35 12 W |
| Krauss Hall | Building | 192 | Cook | 41 53 54 N | 087 48 32 W |
| Krebs School (historical) | School | 240 | Bureau | 41 28 54 N | 089 37 40 W |
| Kreilings Airport | Airport | 153 | Mason | 40 21 12 N | 089 47 14 W |
| Kreitner Elementary School | School | 127 | Madison | 38 39 44 N | 090 02 40 W |
| Krentz Center | Building | 192 | Cook | 41 53 54 N | 087 48 31 W |
| Kress Creek | Stream | | DuPage | 41 51 04 N | 088 12 02 W |
| Kretzmann Hall | Building | 192 | Cook | 41 53 58 N | 087 48 32 W |
| Kritesville | Populated Place | 141 | Calhoun | 39 05 57 N | 090 39 51 W |
| Krohe Cemetery | Cemetery | 156 | Cass | 39 56 31 N | 090 21 05 W |
| Krohe Cemetery | Cemetery | 197 | Schuyler | 40 01 17 N | 090 32 41 W |
| Krohe School (historical) | School | 150 | Cass | 39 57 08 N | 090 21 07 W |
| Krome Family Cemetery | Cemetery | 169 | Madison | 38 43 05 N | 089 59 18 W |
| Kross Cemetery | Cemetery | 151 | Jackson | 37 55 04 N | 089 35 58 W |
| Krotiak Park | Park | 216 | Cook | 41 29 27 N | 087 40 55 W |
| Krug Park | Park | 195 | Kane | 41 43 56 N | 088 19 28 W |
| Kruger Park | Park | 216 | Cook | 41 43 36 N | 087 50 20 W |
| Kruger Siding | Locale | 183 | Logan | 40 10 46 N | 089 19 32 W |
| Krutmeier Airport | Airport | 214 | Adams | 39 49 12 N | 091 13 16 W |
| KSTT-AM (Davenport) | Tower | 226 | Rock Island | 41 23 22 N | 090 31 08 W |
| Kuder School (historical) | School | 210 | Champaign | 40 20 31 N | 087 56 48 W |
| Kuechmann Park | Park | 261 | Lake | 42 12 11 N | 088 06 19 W |
| Kuhn Ditch Number 1 | Canal | 185 | Henry | 41 28 03 N | 089 52 32 W |
| Kuhn Ditch Number 2 | Canal | 186 | Henry | 41 27 09 N | 089 52 32 W |
| Kuhn Station | Populated Place | 168 | Madison | 38 46 55 N | 089 52 35 W |
| Kuiper Landing Strip | Airport | 198 | Iroquois | 40 47 35 N | 088 00 25 W |
| Kumler | Populated Place | 224 | McLean | 40 17 59 N | 088 34 41 W |
| Kuntz Field | Airport | 222 | McLean | 40 43 23 N | 088 52 00 W |
| Kuranz RLA Airport | Airport | 262 | Henry | 42 09 30 N | 088 13 35 W |
| Kurfman Cemetery | Cemetery | 225 | Pike | 39 49 21 N | 090 54 15 W |
| Kusie Island | Island | 148 | Hancock | 40 20 02 N | 091 27 44 W |
| Kuster School (historical) | School | 245 | Bureau | 41 18 25 N | 089 50 16 W |
| Kuster School (historical) | School | 249 | Henry | 41 16 45 N | 089 52 54 W |
| Kuthen Park | Park | 200 | Cook | 42 03 16 N | 087 54 46 W |
| Kutter Park | Park | 141 | Madison | 38 54 00 N | 090 04 47 W |
| Kutz Quarry | Mine | 264 | Ogle | 42 07 51 N | 089 36 05 W |
| Kuykendall Cemetery | Cemetery | 122 | White | 38 05 35 N | 088 05 45 W |
| Kuykendall Valley | Valley | | Gallatin | 37 40 21 N | 088 14 26 W |
| Kyle School (historical) | School | 189 | Effingham | 39 09 44 N | 088 42 36 W |
| Kyle School (historical) | School | 160 | Madison | 38 45 26 N | 089 37 15 W |
| Kyte Creek | Stream | | Rock Island | 41 26 56 N | 090 35 30 W |
| Kyte River | Stream | | Ogle | 41 59 17 N | 089 19 13 W |
| Kyte Side Estates | Populated Place | 241 | Ogle | 41 56 02 N | 089 09 09 W |
| L and N Reservoir Dam | Dam | 152 | Jefferson | 38 19 16 N | 088 54 53 W |
| L D Brady Elementary School | School | 207 | Kane | 41 45 36 N | 088 18 03 W |
| L E Starke Elementary School | School | 158 | Tazewell | 40 35 01 N | 089 37 16 W |
| L H Day School | School | 184 | Cook | 41 44 10 N | 087 39 31 W |
| L J Hauser Junior High School | School | 188 | Cook | 41 49 48 N | 087 49 17 W |
| L J Stevens Middle School | School | 170 | Will | 41 18 04 N | 088 08 24 W |
| L P Dolan Lake | Reservoir | 133 | Hamilton | 38 03 25 N | 088 24 15 W |
| L R Baker Cemetery | Cemetery | 311 | Kane | 41 59 16 N | 088 28 30 W |
| L R Christian Memorial Field | Park | 223 | Rock Island | 41 23 22 N | 090 28 02 W |
| L R Foster Elementary School | School | 204 | Cook | 41 36 50 N | 087 45 52 W |
| L T Stone School | School | 235 | Knox | 40 57 03 N | 090 23 14 W |
| L'Erable | Populated Place | 191 | Iroquois | 40 54 12 N | 087 50 49 W |
| L'Erable Bridge | Bridge | 186 | Iroquois | 40 54 08 N | 087 49 24 W |
| L'Erable Catholic Cemetery | Cemetery | 190 | Iroquois | 40 54 09 N | 087 50 42 W |
| La Bagh Woods | Woods | 180 | Cook | 41 58 44 N | 087 44 36 W |
| La Casa Cultural Latina | Building | 225 | Champaign | 40 06 26 N | 088 13 52 W |
| La Clede | Populated Place | 174 | Fayette | 38 52 47 N | 088 42 55 W |
| La Crosse | Populated Place | 198 | Hancock | 40 31 44 N | 091 01 23 W |
| La Fox | Populated Place | 245 | Kane | 41 53 11 N | 088 24 32 W |
| La Grange | Populated Place | 143 | Brown | 39 56 50 N | 090 32 14 W |
| La Grange | Populated Place | 197 | Cook | 41 48 18 N | 087 52 09 W |
| La Grange Bible Church | Church | 199 | Cook | 41 47 53 N | 087 52 01 W |
| La Grange Country Club | Locale | 203 | Cook | 41 48 03 N | 087 52 51 W |
| La Grange Island | Island | 145 | Adams | 40 02 32 N | 091 29 20 W |
| La Grange Island | Island | 131 | Cass | 39 56 04 N | 090 32 02 W |
| La Grange Lock and Dam | Dam | 131 | Brown | 39 56 26 N | 090 32 00 W |
| La Grange Lock and Dam | Dam | 131 | Cass | 39 56 24 N | 090 32 00 W |
| La Grange Locks (historical) | Dam | 134 | Brown | 39 54 26 N | 090 33 03 W |
| La Grange Memorial Hospital Heliport | Airport | 206 | Cook | 41 47 48 N | 087 53 10 W |
| La Grange Park | Populated Place | 190 | Cook | 41 50 05 N | 087 51 42 W |
| La Grange Park Branch Post Office | Post Office | 190 | Cook | 41 50 05 N | 087 52 00 W |
| La Grange Park Public Library | Building | 195 | Cook | 41 49 29 N | 087 52 17 W |
| La Grange Park Village Hall | Building | 197 | Cook | 41 49 23 N | 087 52 23 W |
| La Grange Park Woods | Woods | 195 | Cook | 41 49 58 N | 087 52 42 W |
| La Grange Pool | Reservoir | 131 | Cass | 39 56 24 N | 090 32 00 W |
| La Grange Post Office | Post Office | 195 | Cook | 41 48 59 N | 087 52 18 W |
| La Grange School (historical) | School | 160 | Brown | 39 57 34 N | 090 32 22 W |
| La Grange Village Hall | Building | 195 | Cook | 41 48 49 N | 087 52 09 W |
| La Harpe | Populated Place | 213 | Hancock | 40 35 00 N | 090 58 10 W |
| La Harpe Creek | Stream | | Hancock | 40 28 04 N | 091 02 34 W |
| La Harpe High School | School | 211 | Hancock | 40 35 03 N | 090 58 29 W |
| La Harpe Historic District | Park | 214 | Hancock | 40 35 00 N | 090 58 11 W |
| La Harpe Reservoir | Reservoir | 200 | Hancock | 40 37 30 N | 091 02 13 W |
| La Harpe Reservoir Dam | Dam | 200 | Hancock | 40 37 30 N | 091 02 13 W |
| La Hogue | Populated Place | 202 | Iroquois | 40 45 48 N | 088 05 17 W |
| La Iglesia de Jesus Cristo de los Santos de los Ultimos Dias | Church | 182 | Cook | 41 55 40 N | 087 42 32 W |
| La Moille | Populated Place | 242 | Bureau | 41 31 54 N | 089 16 47 W |
| La Moille High School | School | 236 | Bureau | 41 31 26 N | 089 16 47 W |
| La Moine Camp | Locale | 196 | Hancock | 40 25 49 N | 090 58 22 W |
| La Moine River | Stream | | Schuyler | 39 59 14 N | 090 30 50 W |
| La Moine School (historical) | School | 175 | Schuyler | 40 05 19 N | 090 40 17 W |
| La Motte School (historical) | School | 163 | Crawford | 38 58 01 N | 087 42 29 W |
| La Paz Child Development Center | School | 181 | Cook | 41 52 02 N | 087 40 05 W |
| La Pere School (historical) | School | 159 | St. Clair | 38 32 07 N | 090 06 15 W |
| La Place Post Office | Post Office | 214 | Piatt | 39 48 00 N | 088 43 04 W |
| La Prairie | Populated Place | 216 | Adams | 40 08 52 N | 091 00 10 W |
| La Prairie Center | Locale | 234 | Marshall | 41 01 01 N | 089 35 26 W |