Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| McLeister Memorial Church | Church | 337 | Summit | 41 02 53 N | 081 30 16 W |
| McLellon Cemetery | Cemetery | 174 | Gallia | 38 41 39 N | 082 11 46 W |
| McLiesh Cemetery | Cemetery | 230 | Gallia | 38 59 42 N | 082 19 26 W |
| McLuney | Populated Place | 250 | Perry | 39 44 25 N | 082 06 09 W |
| McLuney Cemetery | Cemetery | 295 | Perry | 39 45 25 N | 082 09 18 W |
| McLuney Creek | Stream | | Perry | 39 44 00 N | 082 05 58 W |
| McLuney Post Office (historical) | Post Office | 249 | Perry | 39 44 25 N | 082 06 10 W |
| McLure Post Office | Post Office | 206 | Henry | 41 22 15 N | 083 56 30 W |
| McMahon Bar | Bar | 188 | Belmont | 40 00 23 N | 080 44 29 W |
| McMahon Creek | Stream | | Belmont | 40 00 31 N | 080 44 30 W |
| McMaster Hall | Building | 179 | Lucas | 41 39 43 N | 083 36 39 W |
| McMaster Hall | Building | 371 | Stark | 40 54 20 N | 081 06 35 W |
| McMechen Hill | Summit | 392 | Ross | 39 12 36 N | 083 13 56 W |
| McMeen Cemetery | Cemetery | 222 | Seneca | 41 11 18 N | 083 06 16 W |
| McMichael Creek | Stream | | Ashtabula | 41 32 37 N | 080 31 33 W |
| McMicken Commons | Park | 256 | Hamilton | 39 07 54 N | 084 31 07 W |
| McMicken Hall | Building | 257 | Hamilton | 39 07 56 N | 084 31 09 W |
| McMicken-Klotter Playground | Park | 175 | Hamilton | 39 07 19 N | 084 31 45 W |
| McMillan Cemetery | Cemetery | 184 | Erie | 41 22 23 N | 082 32 40 W |
| McMillen Lake | Lake | 325 | Logan | 40 19 04 N | 083 49 44 W |
| McMillen School (historical) | School | 315 | Holmes | 40 36 07 N | 082 02 38 W |
| McMillian Adult Center | School | 252 | Hamilton | 39 07 36 N | 084 29 53 W |
| McMonies Run | Stream | | Belmont | 40 05 31 N | 080 50 45 W |
| McMorran | Populated Place | 327 | Logan | 40 23 22 N | 083 50 54 W |
| McMullen Elementary School | School | 296 | Ashland | 40 38 02 N | 082 13 49 W |
| McMurray Cemetery | Cemetery | 283 | Trumbull | 41 18 32 N | 080 49 25 W |
| McNair Memorial Presbyterian Church | Church | 297 | Fayette | 39 32 46 N | 083 26 04 W |
| McNamara Cemetery | Cemetery | 272 | Delaware | 40 14 18 N | 082 58 48 W |
| McNamee Cemetery | Cemetery | 282 | Fairfield | 39 49 58 N | 082 31 49 W |
| McNary Hill | Summit | 372 | Highland | 39 11 28 N | 083 21 33 W |
| McNary Park | Park | 237 | Montgomery | 39 45 36 N | 084 14 02 W |
| McNary Park Elementary School | School | 237 | Montgomery | 39 45 39 N | 084 14 01 W |
| McNary-Kammer Playground | Park | 237 | Montgomery | 39 45 36 N | 084 14 02 W |
| McNaughton and Snare Mill (historical) | Locale | 298 | Licking | 40 12 56 N | 082 29 04 W |
| McNaughton Cemetery | Cemetery | 262 | Muskingum | 39 52 14 N | 081 46 47 W |
| McNaughton Street Baptist Church | Church | 320 | Summit | 41 04 26 N | 081 29 23 W |
| McNeal Cemetery | Cemetery | 226 | Gallia | 38 53 29 N | 082 26 45 W |
| McNeal Cemetery | Cemetery | 252 | Jackson | 38 54 45 N | 082 34 28 W |
| McNeal Cemetery | Cemetery | 236 | Van Wert | 40 58 33 N | 084 45 44 W |
| McNeal Ditch | Canal | 293 | Miami | 40 00 33 N | 084 03 51 W |
| McNeals Cemetery | Cemetery | 324 | Muskingum | 40 06 13 N | 081 44 28 W |
| McNeely Cemetery | Cemetery | 289 | Highland | 39 01 47 N | 083 45 18 W |
| McNelly Cemetery | Cemetery | 285 | Montgomery | 39 47 46 N | 084 22 46 W |
| McNett Ditch | Canal | 209 | Lucas | 41 39 10 N | 083 51 04 W |
| McNichols School | School | 216 | Hamilton | 39 05 09 N | 084 22 37 W |
| McPherson Cemetery | Cemetery | 206 | Sandusky | 41 18 34 N | 082 58 05 W |
| McPherson Chemical Laboratory | Building | 230 | Franklin | 40 00 08 N | 083 00 45 W |
| McPherson Nazarene Church | Church | 375 | Richland | 40 46 13 N | 082 32 02 W |
| McPherson Run | Stream | | Morgan | 39 30 44 N | 081 51 34 W |
| McPherson Town Historic District | Park | 225 | Montgomery | 39 46 07 N | 084 11 30 W |
| McPhersons School (historical) | School | 287 | Greene | 39 38 57 N | 083 59 54 W |
| McQuade Cemetery | Cemetery | 301 | Guernsey | 40 01 37 N | 081 25 52 W |
| McQuaid (historical) | Populated Place | 315 | Wayne | 40 47 45 N | 081 44 44 W |
| McQuay Ditch | Canal | 311 | Darke | 40 04 42 N | 084 32 01 W |
| McQueen Run | Stream | | Columbiana | 40 35 58 N | 080 39 50 W |
| McReynolds Hall | Building | 217 | Defiance | 41 17 43 N | 084 21 19 W |
| McSweeney Hall | Building | 340 | Portage | 41 08 36 N | 081 20 08 W |
| McTigue Junior High School | School | 190 | Lucas | 41 38 22 N | 083 40 31 W |
| McVay Cemetery | Cemetery | 263 | Monroe | 39 38 40 N | 081 14 33 W |
| McVictory Post Office | Post Office | 318 | Hardin | 40 32 05 N | 083 31 15 W |
| McVitty | Populated Place | 281 | Hardin | 40 45 42 N | 083 32 15 W |
| McWiggin School (historical) | School | 287 | Hardin | 40 39 28 N | 083 27 34 W |
| McZena | Populated Place | 313 | Ashland | 40 41 50 N | 082 08 15 W |
| McZena Post Office (historical) | Post Office | 313 | Ashland | 40 41 50 N | 082 08 15 W |
| Meacham Corners | Locale | 276 | Trumbull | 41 25 08 N | 080 46 37 W |
| Mead Cemetery | Cemetery | 405 | Champaign | 40 11 46 N | 083 36 49 W |
| Mead Corners | Locale | 398 | Morrow | 40 24 31 N | 082 42 19 W |
| Mead Elementary School | School | 208 | Belmont | 39 55 17 N | 080 46 51 W |
| Mead Foremens Club Pond | Reservoir | 225 | Ross | 39 11 48 N | 082 59 24 W |
| Mead Foremens Club Pond Dam | Dam | 225 | Ross | 39 11 48 N | 082 59 24 W |
| Mead Park | Park | 185 | Ross | 39 19 14 N | 082 58 34 W |
| Meade | Populated Place | 245 | Pickaway | 39 30 17 N | 082 52 37 W |
| Meade Avenue Christian Church | Church | 328 | Summit | 41 04 16 N | 081 26 34 W |
| Meade Cemetery | Cemetery | 247 | Pickaway | 39 30 15 N | 082 52 35 W |
| Meade Post Office (historical) | Post Office | 247 | Pickaway | 39 30 15 N | 082 52 35 W |
| Meadow Brook | Stream | | Ottawa | 41 30 18 N | 082 46 33 W |
| Meadow Brook Farm (historical) | Locale | 280 | Licking | 40 02 56 N | 082 20 34 W |
| Meadow Brook Market Square Shopping Center | Locale | 315 | Cuyahoga | 41 24 26 N | 081 31 34 W |
| Meadow Farm | Populated Place | 240 | Muskingum | 39 54 51 N | 082 06 20 W |
| Meadow Farm Methodist Protestant Church | Church | 242 | Muskingum | 39 54 53 N | 082 06 19 W |
| Meadow Farm Post Office (historical) | Post Office | 244 | Muskingum | 39 54 50 N | 082 06 20 W |
| Meadow Grove Wesleyan Church | Church | 319 | Clark | 39 57 06 N | 083 46 05 W |
| Meadow Hollow | Valley | | Jackson | 39 09 49 N | 082 40 49 W |
| Meadow Lake | Lake | 321 | Cuyahoga | 41 24 31 N | 081 25 57 W |
| Meadow Lake | Lake | 310 | Wayne | 40 40 27 N | 081 49 53 W |
| Meadow Lake | Reservoir | 247 | Clermont | 38 58 58 N | 084 13 60 W |
| Meadow Lake Golf Club | Locale | 340 | Stark | 40 50 25 N | 081 21 40 W |
| Meadow Lane (subdivision) | Populated Place | 329 | Clark | 39 55 09 N | 083 45 15 W |
| Meadow Lane Park | Park | 279 | Montgomery | 39 38 35 N | 084 15 10 W |
| Meadow Look | Populated Place | 206 | Gallia | 38 48 09 N | 082 14 34 W |
| Meadow Run | Stream | | Jackson | 39 06 54 N | 082 30 16 W |
| Meadow Run | Stream | | Pike | 39 07 33 N | 082 55 34 W |
| Meadow Run Church | Church | 193 | Pike | 39 06 25 N | 082 55 21 W |
| Meadow Run Church | Church | 184 | Pike | 39 07 23 N | 082 55 36 W |
| Meadow Valley School | School | 318 | Holmes | 40 27 35 N | 081 44 29 W |
| Meadow Valley School | School | 315 | Wayne | 40 41 21 N | 081 39 42 W |
| Meadow Village (subdivision) | Populated Place | 268 | Guernsey | 40 01 02 N | 081 37 09 W |
| Meadow-aire Airport | Airport | 257 | Lorain | 41 12 10 N | 082 06 55 W |
| Meadowbrook | Populated Place | 268 | Muskingum | 39 59 52 N | 082 02 06 W |
| Meadowbrook Church | Church | 184 | Erie | 41 25 26 N | 082 40 42 W |
| Meadowbrook High School | School | 250 | Guernsey | 39 57 00 N | 081 33 40 W |
| Meadowbrook Lake | Reservoir | 307 | Summit | 41 12 06 N | 081 27 17 W |
| Meadowbrook Lake Dam | Dam | 307 | Summit | 41 12 06 N | 081 27 17 W |
| Meadowbrook Lake Park | Park | 311 | Summit | 41 12 01 N | 081 27 03 W |
| Meadowbrook Mobile Home Park (subdivision) | Populated Place | 314 | Ashland | 40 53 02 N | 082 18 36 W |
| Meadowbrook Park | Park | 234 | Seneca | 41 07 47 N | 083 16 30 W |
| Meadowbrook Plaza Shopping Center | Locale | 191 | Lucas | 41 38 18 N | 083 39 60 W |
| Meadowdale Elementary School for Science | School | 298 | Montgomery | 39 48 40 N | 084 15 12 W |
| Meadowdale High School for Cultural Studies/International Baccalaureate | School | 299 | Montgomery | 39 48 41 N | 084 15 03 W |
| Meadowlark Trail | Trail | 272 | Montgomery | 39 47 59 N | 084 21 42 W |