| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Modale | city | Iowa | United States | 41.62 | -96.01 | 1010 | |
| Modern Manor Mobile Home Park | city | Iowa | United States | 41.64 | -91.48 | 830 | |
| Moingona | city | Iowa | United States | 42.02 | -93.93 | 908 | |
| Mona | city | Iowa | United States | 43.49 | -92.94 | 1177 | |
| Monachopolis | city | Iowa | United States | 41.60 | -93.61 | 879 | |
| Mondamin | city | Iowa | United States | 41.71 | -96.02 | 1030 | |
| Moneek | city | Iowa | United States | 43.16 | -91.62 | 1108 | |
| Moneta | city | Iowa | United States | 43.13 | -95.39 | 1669 | |
| Monette | city | Iowa | United States | 41.08 | -94.07 | 1200 | |
| Moningers | city | Iowa | United States | 42.11 | -93.03 | 898 | |
| Monmouth | city | Iowa | United States | 42.08 | -90.88 | 830 | |
| Monona | city | Iowa | United States | 43.05 | -91.39 | 1200 | |
| Monroe | city | Iowa | United States | 41.52 | -93.10 | 902 | |
| Monteith | city | Iowa | United States | 41.63 | -94.43 | 1033 | |
| Monterey | city | Iowa | United States | 40.65 | -92.59 | 898 | |
| Montezuma | city | Iowa | United States | 41.59 | -92.53 | 1003 | |
| Montgomery | city | Iowa | United States | 43.44 | -95.20 | 1669 | |
| Monti | city | Iowa | United States | 42.38 | -91.64 | 974 | |
| Monticello | city | Iowa | United States | 42.24 | -91.19 | 830 | |
| Montour | city | Iowa | United States | 41.98 | -92.71 | 859 | |
| Montpelier | city | Iowa | United States | 41.46 | -90.81 | 830 | |
| Montrose | city | Iowa | United States | 40.53 | -91.41 | 830 | |
| Mooar | city | Iowa | United States | 40.44 | -91.45 | 830 | |
| Moores Siding (historical) | city | Iowa | United States | 43.46 | -94.13 | 1151 | |
| Mooreville (historical) | city | Iowa | United States | 42.25 | -92.30 | 928 | |
| Moorhead | city | Iowa | United States | 41.92 | -95.85 | 1085 | |
| Moorland | city | Iowa | United States | 42.44 | -94.29 | 1148 | |
| Moran | city | Iowa | United States | 41.81 | -93.91 | 898 | |
| Moravia | city | Iowa | United States | 40.89 | -92.82 | 980 | |
| Morgan | city | Iowa | United States | 40.61 | -93.62 | 1049 | |
| Morgin Valley (historical) | city | Iowa | United States | 41.49 | -93.29 | 830 | |
| Morhain | city | Iowa | United States | 42.64 | -93.68 | 1227 | |
| Morley | city | Iowa | United States | 42.01 | -91.25 | 830 | |
| Morning Sun | city | Iowa | United States | 41.10 | -91.26 | 830 | |
| Morningside | city | Iowa | United States | 42.47 | -96.36 | 1200 | |
| Morrisburgh (historical) | city | Iowa | United States | 41.60 | -94.32 | 1151 | |
| Morrison | city | Iowa | United States | 42.34 | -92.67 | 987 | |
| Morse | city | Iowa | United States | 41.75 | -91.43 | 830 | |
| Mortimer (historical) | city | Iowa | United States | 40.88 | -94.32 | 1249 | |
| Morton Mills | city | Iowa | United States | 41.08 | -94.98 | 1128 | |
| Moscow | city | Iowa | United States | 41.58 | -91.08 | 830 | |
| Motor | city | Iowa | United States | 42.81 | -91.35 | 830 | |
| Moulton | city | Iowa | United States | 40.69 | -92.68 | 971 | |
| Mount Auburn | city | Iowa | United States | 42.25 | -92.09 | 853 | |
| Mount Ayr | city | Iowa | United States | 40.71 | -94.24 | 1669 | |
| Mount Carmel | city | Iowa | United States | 42.15 | -94.91 | 1669 | |
| Mount Clare | city | Iowa | United States | 40.52 | -91.45 | 830 | |
| Mount Etna | city | Iowa | United States | 41.12 | -94.74 | 1204 | |
| Mount Hamill | city | Iowa | United States | 40.75 | -91.61 | 830 | |
| Mount Joy | city | Iowa | United States | 41.62 | -90.57 | 830 | |
| Mount Joy Mobile Home Park | city | Iowa | United States | 41.62 | -90.56 | 830 | |
| Mount Lucia | city | Iowa | United States | 42.54 | -96.46 | 1669 | |
| Mount Pleasant | city | Iowa | United States | 40.96 | -91.56 | 830 | |
| Mount Sterling | city | Iowa | United States | 40.62 | -91.93 | 830 | |
| Mount Union | city | Iowa | United States | 41.06 | -91.39 | 830 | |
| Mount Vernon | city | Iowa | United States | 41.92 | -91.42 | 849 | |
| Mount Zion | city | Iowa | United States | 40.79 | -91.93 | 830 | |
| Moville | city | Iowa | United States | 42.49 | -96.07 | 1174 |