Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Karbers Ridge | Karbers Ridge, IL |
| Illinois | Karnak | Karnak, IL |
| Illinois | Kasbeer | Kasbeer, IL |
| Illinois | Keenes | Keenes, IL |
| Illinois | Keensburg | Keensburg, IL |
| Illinois | Keithsburg | Keithsburg, IL |
| Illinois | Kell | Kell, IL |
| Illinois | Kempton | Kempton, IL |
| Illinois | Kenilworth | Kenilworth, IL |
| Illinois | Kenney | Kenney, IL |
| Illinois | Kent | Kent, IL |
| Illinois | Kewanee | Kewanee, IL |
| Illinois | Keyesport | Keyesport, IL |
| Illinois | Kilbourne | Kilbourne, IL |
| Illinois | Kincaid | Kincaid, IL |
| Illinois | Kinderhook | Kinderhook, IL |
| Illinois | Kingston | Kingston, IL |
| Illinois | Kingston Mines | Kingston Mines, IL |
| Illinois | Kinmundy | Kinmundy, IL |
| Illinois | Kinsman | Kinsman, IL |
| Illinois | Kirkland | Kirkland, IL |
| Illinois | Kirkwood | Kirkwood, IL |
| Illinois | Knoxville | Knoxville, IL |
| Illinois | La Fayette | La Fayette, IL |
| Illinois | La Grange | La Grange, IL |