Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Little York | Little York, IL |
| Illinois | Littleton | Littleton, IL |
| Illinois | Liverpool | Liverpool, IL |
| Illinois | Livingston | Livingston, IL |
| Illinois | Loami | Loami, IL |
| Illinois | Lockport | Lockport, IL |
| Illinois | Loda | Loda, IL |
| Illinois | Logan | Logan, IL |
| Illinois | Lomax | Lomax, IL |
| Illinois | Lombard | Lombard, IL |
| Illinois | London Mills | London Mills, IL |
| Illinois | Long Grove | Long Grove, IL |
| Illinois | Long Point | Long Point, IL |
| Illinois | Longview | Longview, IL |
| Illinois | Loraine | Loraine, IL |
| Illinois | Lostant | Lostant, IL |
| Illinois | Louisville | Louisville, IL |
| Illinois | Lovejoy | Lovejoy, IL |
| Illinois | Loves Park | Loves Park, IL |
| Illinois | Lovington | Lovington, IL |
| Illinois | Lowder | Lowder, IL |
| Illinois | Lowpoint | Lowpoint, IL |
| Illinois | Ludlow | Ludlow, IL |
| Illinois | Lyndon | Lyndon, IL |
| Illinois | Lynn Center | Lynn Center, IL |