| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Meadow Brook Mobile Home Park | city | Iowa | United States | 41.48 | -91.71 | 830 | |
| Meadow Lane Mobile Home Park | city | Iowa | United States | 42.65 | -92.34 | 941 | |
| Meadow Lane Mobile Home Park | city | Iowa | United States | 42.01 | -93.61 | 898 | |
| Mechanicsville | city | Iowa | United States | 41.90 | -91.25 | 951 | |
| Mederville | city | Iowa | United States | 42.76 | -91.42 | 830 | |
| Mediapolis | city | Iowa | United States | 41.01 | -91.16 | 830 | |
| Medora | city | Iowa | United States | 41.19 | -93.60 | 971 | |
| Mekee | city | Iowa | United States | 42.49 | -91.05 | 1099 | |
| Mel-Ray Mobile Home Park | city | Iowa | United States | 41.70 | -93.63 | 905 | |
| Melbourne | city | Iowa | United States | 41.94 | -93.10 | 1030 | |
| Melcher-Dallas | city | Iowa | United States | 41.22 | -93.24 | 948 | |
| Melrose | city | Iowa | United States | 40.98 | -93.05 | 892 | |
| Meltonville | city | Iowa | United States | 43.45 | -93.03 | 1233 | |
| Melvin | city | Iowa | United States | 43.29 | -95.61 | 1669 | |
| Mendota (historical) | city | Iowa | United States | 40.60 | -92.92 | 928 | |
| Menlo | city | Iowa | United States | 41.52 | -94.40 | 1200 | |
| Mercer | city | Iowa | United States | 40.94 | -94.65 | 1669 | |
| Meriden | city | Iowa | United States | 42.79 | -95.63 | 1669 | |
| Merle Junction | city | Iowa | United States | 40.78 | -94.59 | 1190 | |
| Merrill | city | Iowa | United States | 42.72 | -96.25 | 1151 | |
| Merrimac | city | Iowa | United States | 41.09 | -91.72 | 830 | |
| Meservey | city | Iowa | United States | 42.91 | -93.48 | 1669 | |
| Mesquakie Indian Settlement | city | Iowa | United States | 41.98 | -92.64 | 885 | |
| Metz | city | Iowa | United States | 41.67 | -93.14 | 830 | |
| Meyer | city | Iowa | United States | 43.46 | -92.69 | 1669 |