Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Maple Leaf Cemetery | Cemetery | 191 | Ottawa | 41 37 57 N | 082 50 13 W |
| Maple Leaf Lake | Reservoir | 332 | Stark | 40 45 36 N | 081 11 29 W |
| Maple Leaf Lake Dam | Dam | 332 | Stark | 40 45 36 N | 081 11 29 W |
| Maple Leaf Plaza Shopping Center | Locale | 384 | Geauga | 41 34 58 N | 081 12 58 W |
| Maple Mound Cemetery | Cemetery | 302 | Wayne | 40 59 07 N | 081 54 06 W |
| Maple Park | Park | 200 | Lorain | 41 25 40 N | 082 08 20 W |
| Maple Park | Park | 319 | Stark | 40 49 36 N | 081 21 07 W |
| Maple Park School (historical) | School | 204 | Butler | 39 31 44 N | 084 22 23 W |
| Maple Post Office (historical) | Post Office | 287 | Brown | 38 54 10 N | 084 02 10 W |
| Maple Ridge | Populated Place | 336 | Mahoning | 40 55 23 N | 081 03 03 W |
| Maple Ridge Cemetery | Cemetery | 227 | Cuyahoga | 41 26 35 N | 081 54 09 W |
| Maple Ridge Elementary School | School | 338 | Mahoning | 40 55 20 N | 081 03 02 W |
| Maple Ridge Golf Course | Locale | 240 | Ashtabula | 41 48 29 N | 080 51 20 W |
| Maple Run | Stream | | Marion | 40 37 29 N | 083 14 57 W |
| Maple School | School | 281 | Trumbull | 41 08 50 N | 080 41 45 W |
| Maple School (historical) | School | 293 | Brown | 39 06 18 N | 083 54 58 W |
| Maple Shade Cemetery | Cemetery | 225 | Cuyahoga | 41 23 44 N | 081 38 21 W |
| Maple Street Christian Church | Church | 175 | Hamilton | 39 13 45 N | 084 27 41 W |
| Maple Street Elementary School | School | 325 | Wayne | 40 50 31 N | 081 46 38 W |
| Maple Street Evangelical United Brethren Church | Church | 254 | Fairfield | 39 42 52 N | 082 35 38 W |
| Maple Street Landing | Locale | 175 | Wood | 41 34 00 N | 083 37 34 W |
| Maple Swamp Ditch | Canal | 329 | Darke | 39 57 44 N | 084 38 29 W |
| Maple Valley | Populated Place | 302 | Summit | 41 05 02 N | 081 34 12 W |
| Maple Valley Branch Library | Building | 303 | Summit | 41 05 02 N | 081 34 06 W |
| Maple Valley School | School | 302 | Summit | 41 05 01 N | 081 34 10 W |
| Maplecrest | Populated Place | 262 | Williams | 41 33 29 N | 084 34 15 W |
| Maplecrest Golf Course | Locale | 340 | Portage | 41 06 08 N | 081 23 07 W |
| Mapledale Elementary School (historical) | School | 214 | Cuyahoga | 41 36 50 N | 081 27 07 W |
| Maplegrove Church (historical) | Church | 277 | Hardin | 40 45 10 N | 083 34 34 W |
| Maplegrove School (historical) | School | 308 | Darke | 40 14 11 N | 084 38 19 W |
| Maplegrove School (historical) | School | 270 | Marion | 40 41 13 N | 083 20 37 W |
| Maplehurst Elementary School | School | 217 | Huron | 41 15 10 N | 082 35 54 W |
| Maplelick Elementary School | School | 264 | Allen | 40 42 43 N | 084 11 11 W |
| Mapleshade | Populated Place | 171 | Gallia | 38 49 17 N | 082 10 36 W |
| Mapleshade Post Office (historical) | Post Office | 171 | Gallia | 38 49 15 N | 082 10 35 W |
| Mapleton | Populated Place | 320 | Stark | 40 44 45 N | 081 14 46 W |
| Mapleton Beach (subdivision) | Populated Place | 184 | Ashtabula | 41 51 40 N | 080 56 59 W |
| Mapleton High School | School | 357 | Ashland | 40 58 05 N | 082 16 52 W |
| Mapleton Post Office (historical) | Post Office | 317 | Stark | 40 44 45 N | 081 14 44 W |
| Mapleton Station (historical) | Locale | 322 | Stark | 40 45 13 N | 081 13 34 W |
| Mapletop School (historical) | School | 278 | Wyandot | 40 44 40 N | 083 29 13 W |
| Mapletown Shopping Center | Locale | 272 | Cuyahoga | 41 24 57 N | 081 34 17 W |
| Mapleview School | School | 340 | Geauga | 41 29 11 N | 081 06 29 W |
| Maplewood | Populated Place | 315 | Shelby | 40 22 34 N | 084 01 33 W |
| Maplewood Cemetery | Cemetery | 252 | Athens | 39 30 23 N | 082 03 29 W |
| Maplewood Cemetery | Cemetery | 159 | Brown | 38 44 07 N | 083 50 16 W |
| Maplewood Cemetery | Cemetery | 311 | Franklin | 40 04 36 N | 082 48 48 W |
| Maplewood Cemetery | Cemetery | 293 | Perry | 39 42 24 N | 082 12 53 W |
| Maplewood Cemetery | Cemetery | 223 | Wood | 41 10 16 N | 083 41 20 W |
| Maplewood Cemetery | Cemetery | 224 | Wood | 41 10 19 N | 083 40 23 W |
| Maplewood Elementary School | School | 201 | Lucas | 41 43 01 N | 083 42 27 W |
| Maplewood Orchard Airport | Airport | 266 | Warren | 39 23 03 N | 084 10 06 W |
| Maplewood Park | Populated Place | 332 | Trumbull | 41 08 08 N | 080 35 04 W |
| Maplewood Post Office | Post Office | 315 | Shelby | 40 22 35 N | 084 01 30 W |
| Maplewood Public School (historical) | School | 245 | Tuscarawas | 40 16 13 N | 081 36 32 W |
| Maplewood Sanitorium | Building | 232 | Warren | 39 25 30 N | 084 12 23 W |
| Maplewood School | School | 211 | Lorain | 41 24 05 N | 082 06 32 W |
| Maplewood United Methodist Church | Church | 190 | Lucas | 41 37 28 N | 083 37 26 W |
| Maplewood United Methodist Church | Church | 314 | Shelby | 40 22 33 N | 084 01 38 W |
| Mar-O-Dell Golf Course | Locale | 296 | Marion | 40 32 17 N | 083 05 35 W |
| Maranatha Baptist Church | Church | 320 | Clark | 39 54 18 N | 083 47 07 W |
| Maranatha Bible Baptist Church | Church | 292 | Marion | 40 35 05 N | 083 07 39 W |
| Maranatha Christian Fellowship Church | Church | 242 | Montgomery | 39 45 42 N | 084 14 42 W |
| Maranatha Seventh Day Adventist Church | Church | 162 | Hamilton | 39 07 02 N | 084 31 46 W |
| Marathon | Populated Place | 279 | Clermont | 39 08 41 N | 084 00 23 W |
| Marathon Post Office | Post Office | 278 | Clermont | 39 08 40 N | 084 00 25 W |
| Marble Cliff | Populated Place | 243 | Franklin | 39 59 12 N | 083 03 42 W |
| Marble Furnace | Populated Place | 205 | Adams | 38 58 30 N | 083 25 39 W |
| Marble Furnace Cemetery | Cemetery | 210 | Adams | 38 58 28 N | 083 25 56 W |
| Marble Furnace Post Office (historical) | Post Office | 205 | Adams | 38 58 30 N | 083 25 39 W |
| Marble Hall | Building | 318 | Clinton | 39 26 36 N | 083 49 01 W |
| Marblecliff Post Office (historical) | Post Office | 243 | Franklin | 39 59 10 N | 083 03 40 W |
| Marblehead | Populated Place | 191 | Ottawa | 41 32 25 N | 082 44 08 W |
| Marblehead Lighthouse | Locale | 175 | Ottawa | 41 32 11 N | 082 42 42 W |
| Marblehead Marina | Locale | 175 | Ottawa | 41 31 21 N | 082 42 57 W |
| Marblehead Peninsula | Cape | 181 | Ottawa | 41 31 20 N | 082 47 30 W |
| Marblehead Post Office (historical) | Post Office | 191 | Ottawa | 41 32 25 N | 082 44 10 W |
| Marblehead Quarry | Mine | 180 | Ottawa | 41 31 44 N | 082 44 09 W |
| Marbly Memorial United Methodist Church | Church | 153 | Hamilton | 39 09 17 N | 084 32 54 W |
| March Run | Stream | | Morrow | 40 37 54 N | 082 46 03 W |
| March Run | Stream | | Washington | 39 29 24 N | 081 27 36 W |
| Marchand (historical) | Populated Place | 328 | Stark | 40 52 54 N | 081 25 41 W |
| Marchand Post Office (historical) | Post Office | 327 | Stark | 40 52 55 N | 081 25 39 W |
| Marcum Cemetery | Cemetery | 231 | Jackson | 38 58 26 N | 082 30 60 W |
| Marcum Conference Center | Building | 266 | Butler | 39 30 47 N | 084 43 41 W |
| Marcum Nature Trail | Trail | 240 | Butler | 39 30 44 N | 084 43 30 W |
| Marcus Run | Stream | | Pike | 39 07 13 N | 082 56 32 W |
| Marcy | Populated Place | 288 | Pickaway | 39 45 06 N | 082 49 43 W |
| Marcy Cemetery | Cemetery | 292 | Pickaway | 39 45 17 N | 082 49 41 W |
| Marcy Post Office (historical) | Post Office | 288 | Fairfield | 39 45 05 N | 082 49 45 W |
| Mare Run | Stream | | Noble | 39 42 33 N | 081 27 19 W |
| Marengo | Populated Place | 353 | Morrow | 40 24 03 N | 082 48 39 W |
| Marengo Cemetery | Cemetery | 350 | Morrow | 40 24 40 N | 082 48 33 W |
| Marengo Island | Island | 175 | Lucas | 41 35 23 N | 083 35 58 W |
| Marengo Post Office | Post Office | 353 | Morrow | 40 24 05 N | 082 48 40 W |
| Marengo United Methodist Church | Church | 353 | Morrow | 40 24 04 N | 082 48 38 W |
| Margaret A Ireland Elementary School | School | 201 | Cuyahoga | 41 30 26 N | 081 38 52 W |
| Margaret Creek | Stream | | Athens | 39 17 59 N | 082 08 50 W |
| Margaret Creek | Stream | | Athens | 39 19 54 N | 082 07 39 W |
| Margaret Creek Conservancy District Reservoir | Reservoir | 212 | Athens | 39 15 12 N | 082 07 30 W |
| Margaret Creek Conservancy District Reservoir | Reservoir | 221 | Athens | 39 15 42 N | 082 06 60 W |
| Margaret Creek Conservancy District Reservoir | Reservoir | 208 | Athens | 39 18 00 N | 082 11 30 W |
| Margaret Creek Watershed Project Number One Dam | Dam | 217 | Athens | 39 13 36 N | 082 10 30 W |
| Margaret Park Elementary School | School | 299 | Summit | 41 03 36 N | 081 32 59 W |
| Margaret Park United Presbyterian Church | Church | 327 | Summit | 41 03 41 N | 081 33 16 W |
| Margaretta High School | School | 199 | Erie | 41 23 57 N | 082 48 06 W |
| Margos Sky Ranch Airport | Airport | 371 | Medina | 41 02 40 N | 081 48 56 W |
| Maria Hall | Building | 202 | Lucas | 41 42 44 N | 083 42 23 W |
| Maria Stein | Populated Place | 296 | Mercer | 40 24 28 N | 084 29 36 W |
| Maria Stein Catholic Church | Church | 301 | Mercer | 40 24 28 N | 084 28 25 W |