Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Marble Rock | Marble Rock, IA |
| Iowa | Marcus | Marcus, IA |
| Iowa | Marengo | Marengo, IA |
| Iowa | Marion | Marion, IA |
| Iowa | Mark | Mark, IA |
| Iowa | Marne | Marne, IA |
| Iowa | Marquette | Marquette, IA |
| Iowa | Marshalltown | Marshalltown, IA |
| Iowa | Martelle | Martelle, IA |
| Iowa | Martensdale | Martensdale, IA |
| Iowa | Martinsburg | Martinsburg, IA |
| Iowa | Mason City | Mason City, IA |
| Iowa | Masonville | Masonville, IA |
| Iowa | Massena | Massena, IA |
| Iowa | Matlock | Matlock, IA |
| Iowa | Maurice | Maurice, IA |
| Iowa | Maxwell | Maxwell, IA |
| Iowa | Maynard | Maynard, IA |
| Iowa | Mc Callsburg | Mc Callsburg, IA |
| Iowa | Mc Causland | Mc Causland, IA |
| Iowa | Mc Clelland | Mc Clelland, IA |
| Iowa | Mc Gregor | Mc Gregor, IA |
| Iowa | Mc Intire | Mc Intire, IA |
| Iowa | Mccallsburg | Mccallsburg, IA |
| Iowa | Mcclelland | Mcclelland, IA |