Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Mcconnell | Mcconnell, IL |
| Illinois | Mchenry | Mchenry, IL |
| Illinois | Mclean | Mclean, IL |
| Illinois | Mcleansboro | Mcleansboro, IL |
| Illinois | Mcnabb | Mcnabb, IL |
| Illinois | Mechanicsburg | Mechanicsburg, IL |
| Illinois | Media | Media, IL |
| Illinois | Medinah | Medinah, IL |
| Illinois | Medora | Medora, IL |
| Illinois | Melrose Park | Melrose Park, IL |
| Illinois | Melvin | Melvin, IL |
| Illinois | Menard | Menard, IL |
| Illinois | Mendon | Mendon, IL |
| Illinois | Mendota | Mendota, IL |
| Illinois | Meredosia | Meredosia, IL |
| Illinois | Merna | Merna, IL |
| Illinois | Metamora | Metamora, IL |
| Illinois | Metcalf | Metcalf, IL |
| Illinois | Metropolis | Metropolis, IL |
| Illinois | Michael | Michael, IL |
| Illinois | Middletown | Middletown, IL |
| Illinois | Midlothian | Midlothian, IL |
| Illinois | Milan | Milan, IL |
| Illinois | Milford | Milford, IL |
| Illinois | Mill Shoals | Mill Shoals, IL |