| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Mud Run | city | Pennsylvania | United States | 40.99 | -75.71 | 1217 | |
| Muddy Creek | city | Pennsylvania | United States | 40.97 | -79.97 | 1197 | |
| Muddy Creek Forks | city | Pennsylvania | United States | 39.81 | -76.48 | 830 | |
| Muff | city | Pennsylvania | United States | 40.88 | -79.34 | 1669 | |
| Muhlenberg | city | Pennsylvania | United States | 40.38 | -75.94 | 295 | |
| Muhlenberg Park | city | Pennsylvania | United States | 40.38 | -75.94 | 295 | |
| Muhlenburg | city | Pennsylvania | United States | 41.23 | -76.16 | 997 | |
| Muir | city | Pennsylvania | United States | 40.59 | -76.52 | 830 | |
| Muirfield | city | Pennsylvania | United States | 40.17 | -75.29 | 298 | |
| Mumbauersville | city | Pennsylvania | United States | 40.42 | -75.46 | 830 | |
| Mummasburg | city | Pennsylvania | United States | 39.89 | -77.29 | 830 | |
| Muncy | city | Pennsylvania | United States | 41.21 | -76.79 | 830 | |
| Muncy Valley | city | Pennsylvania | United States | 41.34 | -76.59 | 1256 | |
| Munderf | city | Pennsylvania | United States | 41.28 | -78.95 | 1669 | |
| Mundys Corner | city | Pennsylvania | United States | 40.44 | -78.84 | 1896 | |
| Munhall | city | Pennsylvania | United States | 40.39 | -79.90 | 977 | |
| Municipality of Monroeville | city | Pennsylvania | United States | 40.42 | -79.79 | 1197 | |
| Municipio de Abington | city | Pennsylvania | United States | 40.12 | -75.12 | 223 | |
| Municipio de Albany | city | Pennsylvania | United States | 40.62 | -75.87 | 830 | |
| Municipio de Bensalem | city | Pennsylvania | United States | 40.10 | -74.95 | 98 | |
| Municipio de Buckingham | city | Pennsylvania | United States | 40.32 | -75.06 | 282 | |
| Municipio de Horsham | city | Pennsylvania | United States | 40.18 | -75.13 | 236 | |
| Municipio de Maxatawny | city | Pennsylvania | United States | 40.54 | -75.69 | 830 | |
| Municipio de Moon | city | Pennsylvania | United States | 40.51 | -80.24 | 1197 | |
| Municipio de Springfield | city | Pennsylvania | United States | 39.93 | -75.32 | 196 | |
| Munntown | city | Pennsylvania | United States | 40.23 | -80.09 | 1220 | |
| Munson | city | Pennsylvania | United States | 40.95 | -78.17 | 1669 | |
| Munster | city | Pennsylvania | United States | 40.47 | -78.65 | 1971 | |
| Murdock | city | Pennsylvania | United States | 39.96 | -79.10 | 1991 | |
| Murdocksville | city | Pennsylvania | United States | 40.48 | -80.36 | 997 | |
| Murray | city | Pennsylvania | United States | 41.47 | -76.34 | 1906 | |
| Murray | city | Pennsylvania | United States | 40.50 | -76.53 | 830 | |
| Murrell | city | Pennsylvania | United States | 40.17 | -76.17 | 403 | |
| Murrinsville | city | Pennsylvania | United States | 41.14 | -79.88 | 1669 | |
| Murry Hill | city | Pennsylvania | United States | 40.28 | -80.16 | 1167 | |
| Murrysville | city | Pennsylvania | United States | 40.43 | -79.70 | 941 | |
| Muse | city | Pennsylvania | United States | 40.29 | -80.20 | 1095 | |
| Muse Junction | city | Pennsylvania | United States | 40.31 | -80.20 | 1190 | |
| Musellmans Crossing | city | Pennsylvania | United States | 41.09 | -77.92 | 1669 | |
| Mushroom Farms | city | Pennsylvania | United States | 41.15 | -75.35 | 1899 | |
| Musselman Grove | city | Pennsylvania | United States | 40.29 | -78.51 | 1669 | |
| Musser | city | Pennsylvania | United States | 40.73 | -77.98 | 1197 | |
| Mustard | city | Pennsylvania | United States | 40.24 | -79.82 | 1108 | |
| Mutchlertown | city | Pennsylvania | United States | 40.68 | -75.24 | 308 | |
| Mutual | city | Pennsylvania | United States | 40.24 | -79.50 | 1099 | |
| Muzette | city | Pennsylvania | United States | 41.47 | -79.23 | 1669 |