Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Messiah Church | Church | 167 | Northumberland | 41 04 21 N | 076 48 59 W |
| Messiah Church | Church | 182 | Perry | 40 32 11 N | 077 00 33 W |
| Messiah Church | Church | 206 | Snyder | 40 48 17 N | 077 12 12 W |
| Messiah College | School | 141 | Cumberland | 40 09 23 N | 076 59 20 W |
| Messiah United Methodist Church | Church | 138 | York | 39 58 48 N | 076 44 10 W |
| Messiah Village | Locale | 137 | Cumberland | 40 12 10 N | 076 58 47 W |
| Messmore | Populated Place | 303 | Fayette | 39 52 42 N | 079 50 41 W |
| Metal | Populated Place | 213 | Franklin | 40 00 50 N | 077 52 44 W |
| Metal Church | Church | 218 | Franklin | 40 01 26 N | 077 52 21 W |
| Metamora Station | Populated Place | 126 | Lehigh | 40 38 15 N | 075 31 53 W |
| Metcalf | Populated Place | 333 | Westmoreland | 40 37 23 N | 079 41 26 W |
| Methacton High School | School | 111 | Montgomery | 40 10 33 N | 075 23 52 W |
| Methodist Hill | Summit | 631 | Franklin | 39 57 38 N | 077 28 40 W |
| Methodist Home for Children | Building | 134 | Cumberland | 40 13 02 N | 076 58 11 W |
| Methodist Training Camp | Locale | 186 | Mifflin | 40 23 32 N | 077 50 46 W |
| Metler Ridge | Ridge | 298 | Lycoming | 41 14 20 N | 076 40 31 W |
| Metropolitan Edison Heliport | Airport | 83 | Berks | 40 22 30 N | 075 56 19 W |
| Metropolitan Edison Substation | Building | 142 | Lebanon | 40 26 40 N | 076 30 39 W |
| Metropolitan Edison Three Mile Island Heliport | Airport | 111 | Dauphin | 40 09 20 N | 076 42 09 W |
| Metropolitan Hospital Springfield Division | Hospital | 66 | Delaware | 39 55 18 N | 075 20 56 W |
| Metropolitan Industrial Park | Locale | 54 | Bucks | 40 07 59 N | 074 59 14 W |
| Metz Airport | Airport | 214 | Perry | 40 22 21 N | 077 19 54 W |
| Metz Dam | Dam | 121 | Pike | 41 19 01 N | 074 47 58 W |
| Metzgar Elementary School | School | 309 | Westmoreland | 40 23 28 N | 079 26 16 W |
| Metzger Trail | Trail | 397 | Lycoming | 41 05 48 N | 077 06 40 W |
| Metzler | Populated Place | 527 | Somerset | 39 55 14 N | 079 16 44 W |
| Metzler Airport | Airport | 131 | Lancaster | 40 10 00 N | 076 23 59 W |
| Metzler School | School | 110 | Lancaster | 40 08 29 N | 076 10 48 W |
| Meuser Park | Park | 105 | Northampton | 40 41 22 N | 075 14 49 W |
| Mexican War Streets | Locale | 235 | Allegheny | 40 27 17 N | 080 00 40 W |
| Mexico | Populated Place | 135 | Juniata | 40 32 15 N | 077 21 12 W |
| Mexico | Populated Place | 165 | Montour | 41 01 16 N | 076 44 54 W |
| Mexico School (historical) | School | 265 | Monroe | 40 56 56 N | 075 22 32 W |
| Meyer Airport | Airport | 97 | Bucks | 40 15 03 N | 075 05 55 W |
| Meyer Cemetery | Cemetery | 331 | Centre | 40 52 25 N | 077 50 50 W |
| Meyer Cemetery | Cemetery | 141 | Lebanon | 40 25 45 N | 076 22 07 W |
| Meyer Church | Church | 146 | Lebanon | 40 25 54 N | 076 22 27 W |
| Meyers High School | School | 161 | Luzerne | 41 14 23 N | 075 54 28 W |
| Meyers Mountain | Summit | 616 | Lackawanna | 41 31 47 N | 075 35 02 W |
| Meyers Run | Stream | | Centre | 40 58 12 N | 078 02 33 W |
| Meyers School | School | 312 | Westmoreland | 40 16 34 N | 079 37 50 W |
| Meyers School | School | 336 | Westmoreland | 40 20 12 N | 079 37 07 W |
| Meyersdale | Populated Place | 605 | Somerset | 39 48 49 N | 079 01 29 W |
| Meyersdale Airport | Airport | 709 | Somerset | 39 50 55 N | 079 01 07 W |
| Meyersdale High School | School | 604 | Somerset | 39 47 50 N | 079 02 26 W |
| Meyersville | Populated Place | 143 | Lehigh | 40 38 47 N | 075 32 54 W |
| Meyler Run | Stream | | Crawford | 41 45 26 N | 080 22 20 W |
| Meylert Creek | Stream | | Susquehanna | 41 52 39 N | 075 43 45 W |
| Miam Hollow | Valley | | McKean | 41 51 42 N | 078 40 35 W |
| Miam Run | Stream | | McKean | 41 51 45 N | 078 40 07 W |
| Mican Dam | Dam | 409 | Wayne | 41 34 43 N | 075 21 20 W |
| Mican Pond | Reservoir | 413 | Wayne | 41 34 42 N | 075 21 23 W |
| Michael Creek | Stream | | Monroe | 41 03 28 N | 075 12 53 W |
| Michael Run | Stream | | York | 39 43 26 N | 076 14 28 W |
| Michael Valley School | School | 266 | Monroe | 40 53 10 N | 075 24 23 W |
| Michaels Cemetery | Cemetery | 268 | Columbia | 40 56 33 N | 076 17 35 W |
| Michaux State Forest | Forest | 396 | Adams | 39 59 25 N | 077 21 31 W |
| Michener Art Museum | Building | 121 | Bucks | 40 18 30 N | 075 07 35 W |
| Michener Post Office (historical) | Post Office | 106 | Bucks | 40 22 36 N | 075 04 54 W |
| Michigan School | School | 387 | Luzerne | 41 23 41 N | 075 55 38 W |
| Michters Distillery | Building | 153 | Lebanon | 40 16 38 N | 076 19 05 W |
| Mickel Hill Church | Church | 543 | Warren | 41 47 56 N | 079 30 55 W |
| Mickleys | Populated Place | 117 | Lehigh | 40 38 50 N | 075 29 44 W |
| Mickleys Gardens | Populated Place | 112 | Lehigh | 40 38 59 N | 075 30 19 W |
| Mid Atlantic Soaring Center Airport | Airport | 166 | Adams | 39 45 25 N | 077 21 05 W |
| Mid Penn Mine Station | Locale | 420 | Clearfield | 40 49 38 N | 078 25 41 W |
| Mid Valley Industrial Park | Locale | 281 | Lackawanna | 41 27 30 N | 075 34 58 W |
| Mid Valley Intermediate Elementary School | School | 238 | Lackawanna | 41 28 14 N | 075 36 07 W |
| Mid Valley Secondary Center | School | 256 | Lackawanna | 41 27 04 N | 075 36 11 W |
| Mid-State Airport | Airport | 582 | Centre | 40 53 00 N | 078 05 14 W |
| Middaugh Cemetery | Cemetery | 467 | Tioga | 41 59 05 N | 077 03 33 W |
| Middaugh Pond | Reservoir | 356 | Pike | 41 16 47 N | 074 54 40 W |
| Middle Branch Big Run | Stream | | Clinton | 41 09 04 N | 077 46 06 W |
| Middle Branch Brodhead Creek | Stream | | Monroe | 41 11 44 N | 075 15 23 W |
| Middle Branch Bush Kill | Stream | | Pike | 41 13 44 N | 075 06 16 W |
| Middle Branch Chillisquaque Creek | Stream | | Montour | 41 04 55 N | 076 39 49 W |
| Middle Branch Conneaut Creek | Stream | | Crawford | 41 51 18 N | 080 28 25 W |
| Middle Branch Dyberry Creek | Stream | | Wayne | 41 42 44 N | 075 19 13 W |
| Middle Branch Genesee River | Stream | | Potter | 41 58 31 N | 077 51 25 W |
| Middle Branch Hicks Run | Stream | | Cameron | 41 25 31 N | 078 21 36 W |
| Middle Branch Little Sandy Creek | Stream | | Jefferson | 41 02 20 N | 079 01 30 W |
| Middle Branch Mill Creek | Stream | | Sullivan | 41 29 03 N | 076 45 13 W |
| Middle Branch Newport Creek | Stream | | Luzerne | 41 11 00 N | 076 03 16 W |
| Middle Branch Pine Run | Stream | | Jefferson | 40 57 54 N | 079 08 57 W |
| Middle Branch Queens Run | Stream | | Clinton | 41 11 01 N | 077 28 32 W |
| Middle Branch Rock Run | Stream | | Centre | 40 58 39 N | 078 00 20 W |
| Middle Branch Twomile Run | Stream | | Clinton | 41 20 11 N | 077 51 19 W |
| Middle Branch West Branch Caldwell Creek | Stream | | Warren | 41 42 47 N | 079 34 25 W |
| Middle Branch White Clay Creek | Stream | | Chester | 39 45 53 N | 075 47 41 W |
| Middle Branch Wilson Run | Stream | | Clearfield | 41 14 03 N | 078 35 25 W |
| Middle Branch Wyalusing Creek | Stream | | Susquehanna | 41 47 25 N | 076 04 13 W |
| MIddle Bucks Institute of Technology | School | 82 | Bucks | 40 16 12 N | 075 05 17 W |
| Middle Church | Church | 353 | Westmoreland | 40 10 39 N | 079 31 46 W |
| Middle Cove Church | Church | 137 | Perry | 40 21 48 N | 077 02 03 W |
| Middle Creek | Populated Place | 187 | Snyder | 40 45 40 N | 077 15 29 W |
| Middle Creek | Stream | | Adams | 39 41 06 N | 077 17 48 W |
| Middle Creek | Stream | | Lancaster | 40 09 52 N | 076 13 57 W |
| Middle Creek | Stream | | Monroe | 40 53 45 N | 075 30 01 W |
| Middle Creek | Stream | | Montgomery | 40 19 13 N | 075 34 42 W |
| Middle Creek | Stream | | Northumberland | 40 43 17 N | 076 44 08 W |
| Middle Creek | Stream | | Schuylkill | 40 37 40 N | 076 23 14 W |
| Middle Creek | Stream | | Snyder | 40 46 30 N | 076 52 04 W |
| Middle Creek | Stream | | Somerset | 39 53 42 N | 079 12 23 W |
| Middle Creek | Stream | | Wayne | 41 28 41 N | 075 10 53 W |
| Middle Creek (historical) | Populated Place | 277 | Schuylkill | 40 38 50 N | 076 21 17 W |
| Middle Creek (historical) | Stream | | Delaware | 39 52 14 N | 075 15 55 W |
| Middle Creek Cemetery | Cemetery | 306 | Monroe | 40 56 40 N | 075 29 14 W |
| Middle Creek Church | Church | 110 | Lancaster | 40 10 55 N | 076 14 06 W |
| Middle Creek Church | Church | 262 | Monroe | 40 56 16 N | 075 29 27 W |
| Middle Creek Church | Church | 615 | Somerset | 39 57 52 N | 079 12 40 W |