Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lynx Post Office | Post Office | 244 | Adams | 38 46 23 N | 083 24 23 W |
| Mackenzie Run | Stream | | Adams | 38 43 08 N | 083 27 01 W |
| Manchester | Populated Place | 154 | Adams | 38 41 17 N | 083 36 34 W |
| Manchester Boat Launch Ramp | Locale | 154 | Adams | 38 41 12 N | 083 36 40 W |
| Manchester Cemetery | Cemetery | 371 | Adams | 38 43 31 N | 083 21 32 W |
| Manchester City Hall | Building | 154 | Adams | 38 41 17 N | 083 36 33 W |
| Manchester High School | School | 167 | Adams | 38 41 36 N | 083 36 30 W |
| Manchester Post Office | Post Office | 154 | Adams | 38 41 17 N | 083 36 35 W |
| Manchester Second Street Cemetery | Cemetery | 153 | Adams | 38 41 19 N | 083 36 13 W |
| Manyopper Landing | Locale | 150 | Adams | 38 40 55 N | 083 28 30 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 |
| Martin Hollow | Valley | | Adams | 38 49 42 N | 083 17 32 W |
| Martins Run | Stream | | Adams | 38 54 21 N | 083 33 25 W |
| May Hill | Populated Place | 306 | Adams | 39 00 46 N | 083 30 29 W |
| May Hill Cemetery | Cemetery | 299 | Adams | 39 00 28 N | 083 29 30 W |
| May Hill Church | Church | 300 | Adams | 39 00 27 N | 083 29 31 W |
| May Hill School (historical) | School | 299 | Adams | 39 00 26 N | 083 29 53 W |
| Mayhill Church of Christ | Church | 304 | Adams | 39 00 51 N | 083 30 24 W |
| Mayhill Post Office (historical) | Post Office | 306 | Adams | 39 00 45 N | 083 30 30 W |
| McCall Cemetery | Cemetery | 184 | Adams | 38 36 29 N | 083 16 57 W |
| McCall Run | Stream | | Adams | 38 36 10 N | 083 16 59 W |
| McCalls Landing | Locale | 149 | Adams | 38 36 06 N | 083 17 04 W |
| McCarty Cemetery | Cemetery | 276 | Adams | 38 47 56 N | 083 28 58 W |
| McClelland Run | Stream | | Adams | 38 40 38 N | 083 37 46 W |
| McColm Church | Church | 278 | Adams | 38 40 20 N | 083 38 45 W |
| McGovney School (historical) | School | 173 | Adams | 38 41 37 N | 083 27 05 W |
| McKahn Hollow | Valley | | Adams | 38 47 31 N | 083 40 46 W |
| McKee Hollow | Valley | | Adams | 38 42 02 N | 083 26 35 W |
| McKenzie Cemetery | Cemetery | 165 | Adams | 38 48 30 N | 083 25 19 W |
| McKinleys Landing | Locale | 150 | Adams | 38 36 38 N | 083 19 05 W |
| Measley School (historical) | School | 281 | Adams | 38 56 02 N | 083 26 36 W |
| Memorial Park | Park | 300 | Adams | 38 56 20 N | 083 39 28 W |
| Middle Branch | Stream | | Adams | 38 46 21 N | 083 21 58 W |
| Middle Branch Mill Creek | Stream | | Adams | 38 46 21 N | 083 21 58 W |
| Middle Fork Ohio Brush Creek | Stream | | Adams | 39 01 48 N | 083 26 10 W |
| Mil School (historical) | School | 221 | Adams | 38 46 17 N | 083 21 24 W |
| Mill Creek | Stream | | Adams | 38 46 44 N | 083 19 60 W |
| Mill Dam Hill | Ridge | 324 | Adams | 38 57 52 N | 083 18 28 W |
| Mineral Springs | Populated Place | 231 | Adams | 38 53 13 N | 083 19 46 W |
| Mineral Springs Lake | Reservoir | 241 | Adams | 38 55 42 N | 083 22 06 W |
| Mineral Springs Lake Dam | Dam | 241 | Adams | 38 55 42 N | 083 22 06 W |
| Mineral Springs Post Office (historical) | Post Office | 231 | Adams | 38 53 13 N | 083 19 46 W |
| Mineral Springs Station (historical) | Locale | 200 | Adams | 38 56 30 N | 083 17 60 W |
| Minque Hollow | Valley | | Adams | 38 44 27 N | 083 21 01 W |
| Minque Run | Stream | | Adams | 38 44 34 N | 083 21 15 W |
| Moon Hollow | Valley | | Adams | 38 44 11 N | 083 21 14 W |
| Moon Ridge | Ridge | 341 | Adams | 38 53 54 N | 083 15 58 W |
| Moon Run | Stream | | Adams | 38 44 15 N | 083 21 15 W |
| Moore (historical) | Populated Place | 160 | Adams | 38 47 55 N | 083 25 42 W |
| Moore Post Office (historical) | Post Office | 160 | Adams | 38 47 55 N | 083 25 42 W |
| Moores Chapel Cemetery | Cemetery | 205 | Adams | 38 47 06 N | 083 18 51 W |
| Moores Run | Stream | | Adams | 38 44 53 N | 083 30 49 W |
| Moors Memorial Chapel | Church | 207 | Adams | 38 47 04 N | 083 18 48 W |
| Morrison Hollow | Valley | | Adams | 38 44 20 N | 083 23 38 W |
| Mount Armenia Cemetery | Cemetery | 288 | Adams | 38 45 51 N | 083 26 17 W |
| Mount Armenia Church | Church | 260 | Adams | 38 45 44 N | 083 26 21 W |
| Mount Calvary Cemetery | Cemetery | 281 | Adams | 38 59 54 N | 083 36 40 W |
| Mount Leigh (historical) | Populated Place | 263 | Adams | 38 57 20 N | 083 34 25 W |
| Mount Leigh Cemetery | Cemetery | 269 | Adams | 38 57 24 N | 083 34 30 W |
| Mount Leigh Post Office (historical) | Post Office | 263 | Adams | 38 57 20 N | 083 34 25 W |
| Mount Tabor School (historical) | School | 369 | Adams | 38 43 45 N | 083 23 48 W |
| Mount Unger Cemetery | Cemetery | 326 | Adams | 38 47 07 N | 083 17 04 W |
| Mount Unger Church | Church | 330 | Adams | 38 47 07 N | 083 17 01 W |
| Mount Unger Ridge | Ridge | 343 | Adams | 38 46 29 N | 083 16 50 W |
| Mount Unger School (historical) | School | 340 | Adams | 38 46 46 N | 083 16 55 W |
| Mount Zion (historical) | Populated Place | 296 | Adams | 38 56 47 N | 083 35 28 W |
| Mount Zion Cemetery | Cemetery | 305 | Adams | 38 56 40 N | 083 35 33 W |
| Mount Zion School (historical) | School | 252 | Adams | 38 48 10 N | 083 22 50 W |
| Murphin Point | Cliff | 263 | Adams | 38 53 29 N | 083 27 24 W |
| Naylor Cemetery | Cemetery | 294 | Adams | 38 43 29 N | 083 31 08 W |
| Needmore School (historical) | School | 368 | Adams | 38 42 31 N | 083 20 30 W |
| Nesbitt Cemetery | Cemetery | 293 | Adams | 38 43 19 N | 083 29 03 W |
| Nesbitt School (historical) | School | 290 | Adams | 38 43 10 N | 083 28 57 W |
| Newman Cemetery | Cemetery | 216 | Adams | 38 56 00 N | 083 16 28 W |
| Nixon Cemetery | Cemetery | 302 | Adams | 38 45 42 N | 083 33 33 W |
| Nixon Chapel | Church | 305 | Adams | 38 45 43 N | 083 33 33 W |
| North Adams High School | School | 279 | Adams | 38 56 11 N | 083 34 20 W |
| Oak Grove Cemetery | Cemetery | 268 | Adams | 38 50 42 N | 083 33 15 W |
| Oak Grove Church | Church | 268 | Adams | 38 50 42 N | 083 33 14 W |
| Oakland Cemetery | Cemetery | 282 | Adams | 39 00 27 N | 083 37 57 W |
| Odd Fellows Cemetery | Cemetery | 171 | Adams | 38 41 40 N | 083 35 59 W |
| Ohio Brush Creek | Stream | | Adams | 38 40 25 N | 083 27 10 W |
| Ohio Brush Creek Boat Launch Ramp | Locale | 152 | Adams | 38 40 30 N | 083 26 60 W |
| Ohio State Park | Park | 168 | Adams | 38 36 27 N | 083 17 43 W |
| Ohio Valley District Free Public Library | Building | 163 | Adams | 38 41 27 N | 083 36 37 W |
| Oil Hollow | Valley | | Adams | 38 42 51 N | 083 24 27 W |
| Olive School (historical) | School | 255 | Adams | 38 51 56 N | 083 31 53 W |
| Opossum Hollow | Valley | | Adams | 38 38 33 N | 083 39 21 W |
| Osman School (historical) | School | 269 | Adams | 38 42 50 N | 083 33 37 W |
| Osman School (historical) | School | 171 | Adams | 38 46 54 N | 083 27 24 W |
| Owl Hollow | Valley | | Adams | 38 40 07 N | 083 20 44 W |
| Owl Hollow | Valley | | Adams | 38 40 16 N | 083 38 14 W |
| Owl Hollow Run | Stream | | Adams | 38 40 13 N | 083 38 12 W |
| Page School (historical) | School | 276 | Adams | 38 48 20 N | 083 29 43 W |
| Palestine School (historical) | School | 265 | Adams | 38 58 24 N | 083 23 30 W |
| Panhandle | Populated Place | 285 | Adams | 38 48 40 N | 083 36 22 W |
| Paradise Hills | Populated Place | 237 | Adams | 38 42 24 N | 083 38 52 W |
| Parrs Landing | Locale | 152 | Adams | 38 37 53 N | 083 39 05 W |
| Peach Mountain | Summit | 386 | Adams | 38 53 43 N | 083 21 43 W |
| Peach Mountain Cemetery | Cemetery | 339 | Adams | 38 53 43 N | 083 20 42 W |
| Peach Mountain Church | Church | 361 | Adams | 38 54 35 N | 083 20 16 W |
| Peach Mountain School (historical) | School | 360 | Adams | 38 54 35 N | 083 20 15 W |
| Peebles | Populated Place | 252 | Adams | 38 56 56 N | 083 24 21 W |
| Peebles High School | School | 263 | Adams | 38 57 07 N | 083 24 42 W |
| Peebles Post Office | Post Office | 254 | Adams | 38 57 00 N | 083 24 15 W |
| Pentecostal Church | Church | 154 | Adams | 38 41 24 N | 083 36 13 W |
| Pike School (historical) | School | 293 | Adams | 38 50 35 N | 083 40 07 W |
| Pine Fork | Stream | | Adams | 38 42 03 N | 083 22 17 W |