| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Kahm | city | Illinois | United States | 39.33 | -90.26 | 830 | |
| Kampenville | city | Illinois | United States | 38.02 | -89.60 | 830 | |
| Kampsville | city | Illinois | United States | 39.30 | -90.61 | 830 | |
| Kane | city | Illinois | United States | 39.19 | -90.35 | 830 | |
| Kaneland Estates | city | Illinois | United States | 41.88 | -88.55 | 830 | |
| Kaneville | city | Illinois | United States | 41.84 | -88.52 | 830 | |
| Kangley | city | Illinois | United States | 41.15 | -88.87 | 830 | |
| Kankakee | city | Illinois | United States | 41.12 | -87.86 | 830 | |
| Kansas | city | Illinois | United States | 39.55 | -87.94 | 830 | |
| Kaolin | city | Illinois | United States | 37.51 | -89.30 | 830 | |
| Kappa | city | Illinois | United States | 40.68 | -89.01 | 830 | |
| Karbers Ridge | city | Illinois | United States | 37.58 | -88.33 | 830 | |
| Karmelberget | city | Illinois | United States | 38.41 | -87.76 | 383 | |
| Karmelbjerget | city | Illinois | United States | 38.41 | -87.76 | 383 | |
| Karmelgebergte | city | Illinois | United States | 38.41 | -87.76 | 383 | |
| Karmelio kalnas | city | Illinois | United States | 38.41 | -87.76 | 383 | |
| Karnak | city | Illinois | United States | 37.29 | -88.98 | 341 | |
| Kasbeer | city | Illinois | United States | 41.51 | -89.46 | 830 | |
| Kaser | city | Illinois | United States | 39.30 | -90.46 | 830 | |
| Kaskaskia | city | Illinois | United States | 37.92 | -89.91 | 367 | |
| Katy Did | city | Illinois | United States | 41.09 | -88.64 | 830 | |
| Kaufman | city | Illinois | United States | 38.86 | -89.78 | 830 | |
| Kay - Lou Trailer Courts | city | Illinois | United States | 37.74 | -88.96 | 830 | |
| Kedron | city | Illinois | United States | 37.67 | -88.34 | 400 | |
| Kedron (historical) | city | Illinois | United States | 41.47 | -89.88 | 830 | |
| Keeler (historical) | city | Illinois | United States | 40.40 | -90.06 | 830 | |
| Keenes | city | Illinois | United States | 38.34 | -88.64 | 830 | |
| Keenesville | city | Illinois | United States | 38.40 | -88.65 | 830 | |
| Keeneyville | city | Illinois | United States | 41.97 | -88.12 | 830 | |
| Keensburg | city | Illinois | United States | 38.35 | -87.87 | 406 | |
| Kegley | city | Illinois | United States | 37.91 | -88.74 | 830 | |
| Keithsburg | city | Illinois | United States | 41.10 | -90.94 | 830 | |
| Kell | city | Illinois | United States | 38.49 | -88.91 | 830 | |
| Keller | city | Illinois | United States | 40.76 | -89.60 | 830 | |
| Kellerville | city | Illinois | United States | 39.93 | -90.93 | 830 | |
| Kelley Corners | city | Illinois | United States | 42.49 | -87.97 | 830 | |
| Kelleys | city | Illinois | United States | 37.60 | -88.96 | 830 | |
| Kellogg | city | Illinois | United States | 38.02 | -90.05 | 364 | |
| Kellyville | city | Illinois | United States | 40.06 | -87.64 | 830 | |
| Kelsey | city | Illinois | United States | 40.24 | -90.04 | 830 | |
| Kelvyn Grove | city | Illinois | United States | 41.93 | -87.75 | 830 | |
| Kemp | city | Illinois | United States | 39.70 | -88.19 | 830 | |
| Kemper | city | Illinois | United States | 39.22 | -90.16 | 830 | |
| Kempside | city | Illinois | United States | 38.32 | -89.43 | 830 | |
| Kempton | city | Illinois | United States | 40.94 | -88.24 | 830 | |
| Kendall Hill | city | Illinois | United States | 38.85 | -90.04 | 830 | |
| Kenilworth | city | Illinois | United States | 42.09 | -87.72 | 830 | |
| Kennedy | city | Illinois | United States | 42.24 | -87.87 | 830 | |
| Kenner | city | Illinois | United States | 38.65 | -88.57 | 830 | |
| Kenney | city | Illinois | United States | 40.10 | -89.09 | 830 | |
| Kennicott Place | city | Illinois | United States | 41.81 | -87.60 | 830 | |
| Kensington | city | Illinois | United States | 41.59 | -87.96 | 830 | |
| Kensington | city | Illinois | United States | 41.68 | -87.61 | 830 | |
| Kensington Club | city | Illinois | United States | 41.65 | -88.21 | 830 | |
| Kent | city | Illinois | United States | 42.31 | -89.90 | 892 | |
| Kentland | city | Illinois | United States | 41.55 | -88.43 | 830 | |
| Kentucky | city | Illinois | United States | 39.59 | -87.61 | 830 | |
| Kentukis | city | Illinois | United States | 39.59 | -87.61 | 830 | |
| Kenwood | city | Illinois | United States | 41.81 | -87.60 | 830 | |
| Kenwood | city | Illinois | United States | 40.11 | -88.29 | 830 | |
| Keptown | city | Illinois | United States | 39.08 | -88.67 | 830 | |
| Kernan | city | Illinois | United States | 41.14 | -88.74 | 830 | |
| Kerrick | city | Illinois | United States | 40.55 | -88.99 | 853 | |
| Kewanee | city | Illinois | United States | 41.25 | -89.92 | 830 | |
| Keyesport | city | Illinois | United States | 38.74 | -89.27 | 830 | |
| Keyesport Landing | city | Illinois | United States | 38.76 | -89.27 | 830 | |
| Keys | city | Illinois | United States | 39.78 | -89.57 | 830 | |
| Kibbie | city | Illinois | United States | 39.07 | -87.94 | 830 | |
| Kickapoo | city | Illinois | United States | 40.79 | -89.75 | 830 | |
| Kickapoo | city | Illinois | United States | 40.67 | -89.65 | 830 | |
| Kidd | city | Illinois | United States | 38.12 | -90.17 | 387 | |
| Kidley | city | Illinois | United States | 39.75 | -87.54 | 830 | |
| Kikako | city | Illinois | United States | 41.85 | -87.65 | 830 | |
| Kilbourne | city | Illinois | United States | 40.15 | -90.01 | 830 | |
| Kildeer | city | Illinois | United States | 42.17 | -88.05 | 830 | |
| Killgubbin | city | Illinois | United States | 41.89 | -87.64 | 830 | |
| Kilpatricks Mobile Home Park | city | Illinois | United States | 40.73 | -89.02 | 830 | |
| Kimberleigh | city | Illinois | United States | 42.12 | -87.79 | 830 | |
| Kincaid | city | Illinois | United States | 39.59 | -89.41 | 830 | |
| Kinchester Lane Subdivision | city | Illinois | United States | 42.14 | -87.85 | 830 | |
| Kinderhook | city | Illinois | United States | 39.70 | -91.15 | 830 | |
| King | city | Illinois | United States | 39.23 | -90.58 | 830 | |
| King Acres | city | Illinois | United States | 41.63 | -87.99 | 830 | |
| Kingdom | city | Illinois | United States | 41.89 | -89.39 | 830 | |
| Kingman | city | Illinois | United States | 39.30 | -88.56 | 830 | |
| Kings | city | Illinois | United States | 42.00 | -89.11 | 866 | |
| Kings | city | Illinois | United States | 39.68 | -87.99 | 830 | |
| Kings Island | city | Illinois | United States | 42.38 | -88.18 | 830 | |
| Kings Mill | city | Illinois | United States | 41.95 | -88.41 | 846 | |
| Kings Park | city | Illinois | United States | 41.70 | -88.05 | 830 | |
| Kingsport Court | city | Illinois | United States | 42.13 | -87.86 | 830 | |
| Kingston | city | Illinois | United States | 42.10 | -88.76 | 830 | |
| Kingston | city | Illinois | United States | 39.82 | -91.03 | 830 | |
| Kingston Mines | city | Illinois | United States | 40.56 | -89.77 | 830 | |
| Kingstone Hills | city | Illinois | United States | 41.62 | -87.93 | 830 | |
| Kinmundy | city | Illinois | United States | 38.77 | -88.85 | 830 | |
| Kinseys Little Farms | city | Illinois | United States | 42.23 | -89.08 | 830 | |
| Kinsman | city | Illinois | United States | 41.19 | -88.57 | 830 | |
| Kinswept Subdivision | city | Illinois | United States | 42.10 | -87.85 | 830 | |
| Kinzies Addition | city | Illinois | United States | 41.89 | -87.62 | 830 | |
| Kirkland | city | Illinois | United States | 42.09 | -88.85 | 830 | |
| Kirksville | city | Illinois | United States | 39.57 | -88.67 | 830 | |
| Kirkwood | city | Illinois | United States | 40.87 | -90.75 | 830 | |
| Kisch | city | Illinois | United States | 39.92 | -90.20 | 830 | |
| Kise Crossing | city | Illinois | United States | 38.42 | -90.26 | 396 | |
| Kishwaukee | city | Illinois | United States | 42.17 | -89.15 | 830 | |
| Kishwaukee Glen | city | Illinois | United States | 42.19 | -89.02 | 830 | |
| Kishwaukee Subdivision | city | Illinois | United States | 42.23 | -89.09 | 830 | |
| Kittredge | city | Illinois | United States | 42.13 | -89.78 | 853 | |
| Klines Corner | city | Illinois | United States | 38.37 | -88.26 | 830 | |
| Klondike | city | Illinois | United States | 42.42 | -88.15 | 830 | |
| Klondike | city | Illinois | United States | 37.06 | -89.23 | 305 | |
| Knapp | city | Illinois | United States | 39.71 | -89.82 | 830 | |
| Knob Hill | city | Illinois | United States | 41.60 | -88.50 | 830 | |
| Knoll Creek West | city | Illinois | United States | 41.93 | -88.36 | 830 | |
| Knollwood | city | Illinois | United States | 42.20 | -88.12 | 830 | |
| Knollwood | city | Illinois | United States | 42.29 | -87.89 | 830 | |
| Knollwood | city | Illinois | United States | 39.92 | -89.58 | 830 | |
| Knollwood Estates Mobile Home Park | city | Illinois | United States | 42.27 | -89.61 | 830 | |
| Knox | city | Illinois | United States | 40.93 | -90.25 | 830 | |
| Knoxville | city | Illinois | United States | 40.91 | -90.28 | 830 | |
| Koster | city | Illinois | United States | 41.09 | -87.69 | 830 | |
| Kritesville | city | Illinois | United States | 39.10 | -90.66 | 830 | |
| Kuhn Station | city | Illinois | United States | 38.78 | -89.88 | 830 | |
| Kumler | city | Illinois | United States | 40.30 | -88.58 | 830 | |
| Kylemore | city | Illinois | United States | 41.56 | -87.98 | 830 | |
| Kyte Side Estates | city | Illinois | United States | 41.93 | -89.15 | 830 |