Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Marion | Marion, IL |
| Illinois | Marissa | Marissa, IL |
| Illinois | Mark | Mark, IL |
| Illinois | Markham | Markham, IL |
| Illinois | Maroa | Maroa, IL |
| Illinois | Marseilles | Marseilles, IL |
| Illinois | Marshall | Marshall, IL |
| Illinois | Martinsville | Martinsville, IL |
| Illinois | Martinton | Martinton, IL |
| Illinois | Maryville | Maryville, IL |
| Illinois | Mascoutah | Mascoutah, IL |
| Illinois | Mason | Mason, IL |
| Illinois | Mason City | Mason City, IL |
| Illinois | Matherville | Matherville, IL |
| Illinois | Matteson | Matteson, IL |
| Illinois | Mattoon | Mattoon, IL |
| Illinois | Maunie | Maunie, IL |
| Illinois | Maywood | Maywood, IL |
| Illinois | Mazon | Mazon, IL |
| Illinois | Mc Clure | Mc Clure, IL |
| Illinois | Mc Connell | Mc Connell, IL |
| Illinois | Mc Lean | Mc Lean, IL |
| Illinois | Mc Leansboro | Mc Leansboro, IL |
| Illinois | Mc Nabb | Mc Nabb, IL |
| Illinois | Mcclure | Mcclure, IL |