| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Mabee Corner | city | Ohio | United States | 38.90 | -82.72 | 830 | |
| MacAdam (historical) | city | Ohio | United States | 40.77 | -84.55 | 830 | |
| MacArthur Park | city | Ohio | United States | 41.44 | -82.72 | 830 | |
| Macedon | city | Ohio | United States | 40.48 | -84.75 | 898 | |
| Macedonia | city | Ohio | United States | 41.31 | -81.51 | 1013 | |
| Macedonia | city | Ohio | United States | 39.35 | -84.80 | 830 | |
| Maces Mobile Estates | city | Ohio | United States | 40.99 | -81.41 | 1187 | |
| Mack | city | Ohio | United States | 39.16 | -84.65 | 898 | |
| Mackachack (historical) | city | Ohio | United States | 40.25 | -83.73 | 1177 | |
| Macksburg | city | Ohio | United States | 39.63 | -81.46 | 830 | |
| Mackstown | city | Ohio | United States | 40.15 | -82.88 | 898 | |
| Macochee Castle | city | Ohio | United States | 40.26 | -83.72 | 1181 | |
| Macon | city | Ohio | United States | 38.97 | -83.73 | 1040 | |
| Mad River | city | Ohio | United States | 39.90 | -83.92 | 898 | |
| Madden Corners | city | Ohio | United States | 41.21 | -80.74 | 967 | |
| Maddens (historical) | city | Ohio | United States | 40.01 | -81.98 | 830 | |
| Madeira | city | Ohio | United States | 39.19 | -84.36 | 830 | |
| Madeira (historical) | city | Ohio | United States | 41.17 | -84.05 | 830 | |
| Maderite Heights | city | Ohio | United States | 41.18 | -80.97 | 898 | |
| Madison | city | Ohio | United States | 41.77 | -81.05 | 830 | |
| Madison Addition | city | Ohio | United States | 41.19 | -83.43 | 830 | |
| Madison Beach | city | Ohio | United States | 41.84 | -81.03 | 830 | |
| Madison City Mobile Home Park | city | Ohio | United States | 40.78 | -82.47 | 1669 | |
| Madison Dock (historical) | city | Ohio | United States | 41.85 | -81.01 | 830 | |
| Madison Hill | city | Ohio | United States | 40.78 | -81.93 | 1000 | |
| Madison Lake | city | Ohio | United States | 39.87 | -83.38 | 997 | |
| Madison Mills | city | Ohio | United States | 39.65 | -83.34 | 898 | |
| Madison-on-the-Lake | city | Ohio | United States | 41.84 | -81.05 | 830 | |
| Madisonburg | city | Ohio | United States | 40.86 | -81.93 | 1095 | |
| Madisonville | city | Ohio | United States | 39.16 | -84.39 | 830 | |
| Madland (historical) | city | Ohio | United States | 38.76 | -82.68 | 830 | |
| Magnetic Springs | city | Ohio | United States | 40.35 | -83.26 | 898 | |
| Magnolia | city | Ohio | United States | 40.65 | -81.30 | 984 | |
| Mahoning | city | Ohio | United States | 41.26 | -81.05 | 944 | |
| Main Meadows Mobile Home Park | city | Ohio | United States | 39.80 | -84.31 | 898 | |
| Maineville | city | Ohio | United States | 39.32 | -84.22 | 830 | |
| Mainsville | city | Ohio | United States | 39.71 | -82.24 | 898 | |
| Malaga | city | Ohio | United States | 39.85 | -81.15 | 1210 | |
| Malinta | city | Ohio | United States | 41.32 | -84.04 | 830 | |
| Mallard Cove | city | Ohio | United States | 41.43 | -81.96 | 830 | |
| Mallet Creek | city | Ohio | United States | 41.17 | -81.93 | 1030 | |
| Maloneys Mobile Home Park | city | Ohio | United States | 39.96 | -80.76 | 830 | |
| Malta | city | Ohio | United States | 39.65 | -81.86 | 830 | |
| Malvern | city | Ohio | United States | 40.69 | -81.18 | 997 | |
| Manara | city | Ohio | United States | 39.60 | -83.31 | 898 | |
| Manchester | city | Ohio | United States | 38.69 | -83.61 | 830 | |
| Manchester | city | Ohio | United States | 40.94 | -81.57 | 1095 | |
| Mandale | city | Ohio | United States | 41.02 | -84.36 | 830 | |
| Manhattan Beach | city | Ohio | United States | 41.58 | -81.58 | 830 | |
| Manker (historical) | city | Ohio | United States | 38.59 | -82.51 | 830 | |
| Manleys Subdivision | city | Ohio | United States | 41.60 | -84.56 | 885 | |
| Mann | city | Ohio | United States | 41.59 | -80.64 | 980 | |
| Manor (historical) | city | Ohio | United States | 39.59 | -84.14 | 997 | |
| Mansard Estates | city | Ohio | United States | 40.19 | -82.93 | 905 | |
| Mansfield | city | Ohio | United States | 40.76 | -82.52 | 1223 | |
| Mantua | city | Ohio | United States | 41.28 | -81.22 | 1099 | |
| Mantua | city | Ohio | United States | 40.08 | -81.68 | 951 | |
| Mantua Center | city | Ohio | United States | 41.31 | -81.24 | 1200 | |
| Mantua Corners | city | Ohio | United States | 41.31 | -81.22 | 1233 | |
| Maple | city | Ohio | United States | 38.90 | -84.04 | 902 | |
| Maple Corner | city | Ohio | United States | 39.61 | -83.91 | 984 | |
| Maple Del Manor | city | Ohio | United States | 41.17 | -81.16 | 1095 | |
| Maple Grove | city | Ohio | United States | 41.21 | -83.23 | 830 | |
| Maple Grove | city | Ohio | United States | 39.37 | -83.10 | 830 | |
| Maple Grove | city | Ohio | United States | 41.40 | -81.11 | 1669 | |
| Maple Grove (historical) | city | Ohio | United States | 41.59 | -83.20 | 830 | |
| Maple Grove (historical) | city | Ohio | United States | 39.10 | -82.57 | 830 | |
| Maple Grove Mobile Home Park | city | Ohio | United States | 39.85 | -84.00 | 879 | |
| Maple Grove Mobile Home Park | city | Ohio | United States | 39.63 | -84.29 | 830 | |
| Maple Grove Park | city | Ohio | United States | 40.80 | -82.96 | 1003 | |
| Maple Heights | city | Ohio | United States | 41.42 | -81.57 | 902 | |
| Maple Hill Mobile Home Park | city | Ohio | United States | 41.39 | -83.65 | 830 | |
| Maple Rest Mobile Court | city | Ohio | United States | 40.94 | -81.11 | 1082 | |
| Maple Ridge | city | Ohio | United States | 40.92 | -81.05 | 1095 | |
| Maple Ridge Community | city | Ohio | United States | 41.61 | -81.18 | 1246 | |
| Maple Valley | city | Ohio | United States | 41.08 | -81.57 | 1023 | |
| Maplecrest | city | Ohio | United States | 41.56 | -84.57 | 846 | |
| Maplecrest | city | Ohio | United States | 40.06 | -84.18 | 889 | |
| Maplecroft Mobile Home Park | city | Ohio | United States | 40.98 | -80.65 | 1112 | |
| Mapleshade | city | Ohio | United States | 38.82 | -82.18 | 830 | |
| Mapleton | city | Ohio | United States | 40.75 | -81.25 | 1095 | |
| Mapleton Beach | city | Ohio | United States | 41.86 | -80.95 | 830 | |
| Mapleview Mobile Home Manor | city | Ohio | United States | 40.73 | -81.52 | 997 | |
| Maplewood | city | Ohio | United States | 40.38 | -84.03 | 1020 | |
| Maplewood Park | city | Ohio | United States | 41.14 | -80.58 | 1072 | |
| Maplewood Park | city | Ohio | United States | 41.58 | -83.99 | 830 | |
| Mar-nel Mobile Home Park | city | Ohio | United States | 40.17 | -83.72 | 1082 | |
| Marathon | city | Ohio | United States | 39.14 | -84.01 | 882 | |
| Marble Cliff | city | Ohio | United States | 39.99 | -83.06 | 830 | |
| Marble Furnace | city | Ohio | United States | 38.98 | -83.43 | 830 | |
| Marblehead | city | Ohio | United States | 41.54 | -82.74 | 830 | |
| Marchand (historical) | city | Ohio | United States | 40.88 | -81.43 | 1099 | |
| Marcy | city | Ohio | United States | 39.75 | -82.83 | 941 | |
| Mareddy Estates | city | Ohio | United States | 41.88 | -80.83 | 830 | |
| Marengo | city | Ohio | United States | 40.40 | -82.81 | 1138 | |
| Margies Cove | city | Ohio | United States | 39.86 | -83.08 | 830 | |
| Maria Stein | city | Ohio | United States | 40.41 | -84.49 | 974 | |
| Mariemont | city | Ohio | United States | 39.15 | -84.37 | 830 | |
| Marietta | city | Ohio | United States | 39.42 | -81.45 | 830 | |
| Marietta Marina Trailer Park | city | Ohio | United States | 39.42 | -81.47 | 830 | |
| Marilee Estates Mobile Home Park | city | Ohio | United States | 40.76 | -84.08 | 846 | |
| Mariners Point | city | Ohio | United States | 40.55 | -84.55 | 898 | |
| Marion | city | Ohio | United States | 40.59 | -83.13 | 964 | |
| Mark Center | city | Ohio | United States | 41.29 | -84.63 | 830 | |
| Markle | city | Ohio | United States | 40.45 | -80.62 | 830 | |
| Markley (historical) | city | Ohio | United States | 39.93 | -83.52 | 1099 | |
| Marks (historical) | city | Ohio | United States | 40.75 | -81.28 | 1095 | |
| Marl City | city | Ohio | United States | 40.43 | -83.69 | 1669 | |
| Marlain Acres | city | Ohio | United States | 39.23 | -84.50 | 830 | |
| Marlboro | city | Ohio | United States | 40.95 | -81.21 | 1141 | |
| Marne | city | Ohio | United States | 40.07 | -82.31 | 830 | |
| Marquand Mills | city | Ohio | United States | 40.15 | -81.80 | 846 | |
| Marquis | city | Ohio | United States | 40.99 | -80.76 | 1154 | |
| Marr | city | Ohio | United States | 39.63 | -81.23 | 997 | |
| Marseilles | city | Ohio | United States | 40.70 | -83.39 | 898 | |
| Marshall | city | Ohio | United States | 39.15 | -83.48 | 997 | |
| Marshall Estates | city | Ohio | United States | 40.90 | -81.73 | 1095 | |
| Marshallville | city | Ohio | United States | 40.90 | -81.73 | 1095 | |
| Marshs (historical) | city | Ohio | United States | 40.56 | -83.44 | 987 | |
| Martel | city | Ohio | United States | 40.67 | -82.91 | 1023 | |
| Martin | city | Ohio | United States | 41.56 | -83.34 | 830 | |
| Martin Mobile Home Park | city | Ohio | United States | 41.06 | -80.64 | 1085 | |
| Martins Ferry | city | Ohio | United States | 40.10 | -80.72 | 830 | |
| Martinsburg | city | Ohio | United States | 40.27 | -82.35 | 1095 | |
| Martinsburg (historical) | city | Ohio | United States | 39.11 | -82.22 | 830 | |
| Martinstown (historical) | city | Ohio | United States | 40.91 | -83.65 | 830 | |
| Martinsville | city | Ohio | United States | 39.32 | -83.81 | 1040 | |
| Martinsville | city | Ohio | United States | 40.61 | -81.87 | 994 | |
| Mary Ellen | city | Ohio | United States | 39.37 | -84.22 | 830 | |
| Marydale | city | Ohio | United States | 39.29 | -82.16 | 830 | |
| Marysville | city | Ohio | United States | 39.95 | -81.60 | 997 | |
| Marysville | city | Ohio | United States | 40.24 | -83.37 | 997 | |
| Marysville Estates | city | Ohio | United States | 40.24 | -83.36 | 997 | |
| Mason | city | Ohio | United States | 39.36 | -84.31 | 830 | |
| Mason Mobile Home Park | city | Ohio | United States | 39.34 | -84.34 | 898 | |
| Massie (historical) | city | Ohio | United States | 38.91 | -82.79 | 830 | |
| Massieville | city | Ohio | United States | 39.27 | -82.97 | 830 | |
| Massillon | city | Ohio | United States | 40.80 | -81.52 | 997 | |
| Masury | city | Ohio | United States | 41.21 | -80.54 | 898 | |
| Mathers Mills | city | Ohio | United States | 39.43 | -84.10 | 898 | |
| Matthews Trailer Park | city | Ohio | United States | 40.27 | -81.59 | 830 | |
| Matville | city | Ohio | United States | 39.76 | -83.10 | 830 | |
| Maud | city | Ohio | United States | 39.36 | -84.39 | 869 | |
| Maumee | city | Ohio | United States | 41.56 | -83.65 | 830 | |
| Maumee Valley Mobile Home Park | city | Ohio | United States | 41.38 | -84.13 | 830 | |
| Maurer Trailer Park | city | Ohio | United States | 40.39 | -81.36 | 898 | |
| Maurers Mobile Home Court | city | Ohio | United States | 41.42 | -83.66 | 830 | |
| Maustown | city | Ohio | United States | 39.41 | -84.45 | 830 | |
| Max (historical) | city | Ohio | United States | 39.63 | -82.39 | 898 | |
| Maxatawney Subdivision | city | Ohio | United States | 38.83 | -82.21 | 830 | |
| Maximo | city | Ohio | United States | 40.88 | -81.17 | 1200 | |
| Maxville | city | Ohio | United States | 39.62 | -82.33 | 980 | |
| May Hill | city | Ohio | United States | 39.01 | -83.51 | 958 | |
| Maybee | city | Ohio | United States | 40.78 | -82.62 | 1669 | |
| Mayfair East | city | Ohio | United States | 40.97 | -81.44 | 1099 | |
| Mayfair Estates | city | Ohio | United States | 40.97 | -81.46 | 1171 | |
| Mayfair Heights | city | Ohio | United States | 40.98 | -81.44 | 1095 | |
| Mayfair Park | city | Ohio | United States | 41.71 | -83.56 | 830 | |
| Mayfair Park | city | Ohio | United States | 39.87 | -83.09 | 830 | |
| Mayfield | city | Ohio | United States | 39.49 | -84.37 | 830 | |
| Mayfield | city | Ohio | United States | 41.55 | -81.44 | 912 | |
| Mayfield Heights | city | Ohio | United States | 41.52 | -81.46 | 1089 | |
| Mayfield Mobile Home Park | city | Ohio | United States | 40.97 | -81.45 | 1138 | |
| Mayflower Village | city | Ohio | United States | 40.80 | -81.55 | 1000 | |
| Maynard | city | Ohio | United States | 40.12 | -80.88 | 898 | |
| Maysville | city | Ohio | United States | 39.90 | -82.03 | 830 | |
| Maysville | city | Ohio | United States | 40.70 | -81.79 | 1210 | |
| Maysville | city | Ohio | United States | 40.73 | -83.88 | 997 | |
| Maysville | city | Ohio | United States | 40.15 | -81.80 | 830 | |
| Maysville | city | Ohio | United States | 39.55 | -82.32 | 964 |