Towns
| State | City/Town | Town Title |
|---|---|---|
| Iowa | Mcgregor | Mcgregor, IA |
| Iowa | Mcintire | Mcintire, IA |
| Iowa | Mechanicsville | Mechanicsville, IA |
| Iowa | Melbourne | Melbourne, IA |
| Iowa | Melcher | Melcher, IA |
| Iowa | Melrose | Melrose, IA |
| Iowa | Melvin | Melvin, IA |
| Iowa | Menlo | Menlo, IA |
| Iowa | Meriden | Meriden, IA |
| Iowa | Merrill | Merrill, IA |
| Iowa | Meservey | Meservey, IA |
| Iowa | Middle Amana | Middle Amana, IA |
| Iowa | Middletown | Middletown, IA |
| Iowa | Miles | Miles, IA |
| Iowa | Milford | Milford, IA |
| Iowa | Millersburg | Millersburg, IA |
| Iowa | Millerton | Millerton, IA |
| Iowa | Milo | Milo, IA |
| Iowa | Milton | Milton, IA |
| Iowa | Minburn | Minburn, IA |
| Iowa | Minden | Minden, IA |
| Iowa | Mineola | Mineola, IA |
| Iowa | Mingo | Mingo, IA |
| Iowa | Missouri Valley | Missouri Valley, IA |
| Iowa | Mitchellville | Mitchellville, IA |