Towns
| State | City/Town | Town Title |
|---|---|---|
| Illinois | Morris | Morris, IL |
| Illinois | Morrison | Morrison, IL |
| Illinois | Morrisonville | Morrisonville, IL |
| Illinois | Morton | Morton, IL |
| Illinois | Morton Grove | Morton Grove, IL |
| Illinois | Mossville | Mossville, IL |
| Illinois | Mound City | Mound City, IL |
| Illinois | Mounds | Mounds, IL |
| Illinois | Mount Auburn | Mount Auburn, IL |
| Illinois | Mount Carmel | Mount Carmel, IL |
| Illinois | Mount Carroll | Mount Carroll, IL |
| Illinois | Mount Erie | Mount Erie, IL |
| Illinois | Mount Morris | Mount Morris, IL |
| Illinois | Mount Olive | Mount Olive, IL |
| Illinois | Mount Prospect | Mount Prospect, IL |
| Illinois | Mount Pulaski | Mount Pulaski, IL |
| Illinois | Mount Sterling | Mount Sterling, IL |
| Illinois | Mount Vernon | Mount Vernon, IL |
| Illinois | Moweaqua | Moweaqua, IL |
| Illinois | Mozier | Mozier, IL |
| Illinois | Mt Zion | Mt Zion, IL |
| Illinois | Muddy | Muddy, IL |
| Illinois | Mulberry Grove | Mulberry Grove, IL |
| Illinois | Mulkeytown | Mulkeytown, IL |
| Illinois | Muncie | Muncie, IL |