Place
- Illinois--Maroa1
- Illinois--Mascoutah1
- Illinois--McLeansboro1
- Illinois--Meredosia1
- Illinois--Metamora1
- Illinois--Metropolis1
- Illinois--Millstadt1
- Illinois--Morton1
- Illinois--Mounds1
- Illinois--Mount Carmel1
- Illinois--Mount Olive1
- Illinois--Mount Pulaski1
- Illinois--Mount Sterling1
- Illinois--Neoga1
- Illinois--Neponset1
- Illinois--New Athens1
- Illinois--Newton1
- Illinois--Olney1
- Illinois--Oneida1
- Illinois--Palestine1