| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Mud Run | city | Pennsylvania | United States | 40.98972 | -75.71278 | 994 | 3239 |
| Muddy Creek | city | Pennsylvania | United States | 40.97222 | -79.97139 | 1197 | 4779 |
| Muddy Creek Forks | city | Pennsylvania | United States | 39.80806 | -76.47556 | 426 | 5064 |
| Muff | city | Pennsylvania | United States | 40.88444 | -79.33833 | 1574 | 2344 |
| Muhlenberg | city | Pennsylvania | United States | 40.38306 | -75.93917 | 295 | 84758 |
| Muhlenburg | city | Pennsylvania | United States | 41.22889 | -76.15944 | 997 | 4218 |
| Muir | city | Pennsylvania | United States | 40.59222 | -76.51889 | 800 | 4451 |
| Mumbauersville | city | Pennsylvania | United States | 40.41833 | -75.46 | 600 | 15364 |
| Mummasburg | city | Pennsylvania | United States | 39.88556 | -77.28972 | 590 | 6948 |
| Muncy | city | Pennsylvania | United States | 41.20556 | -76.78583 | 518 | 7025 |
| Muncy Valley | city | Pennsylvania | United States | 41.3425 | -76.58556 | 1256 | 637 |
| Munderf | city | Pennsylvania | United States | 41.28444 | -78.94972 | 1630 | 1392 |
| Mundys Corner | city | Pennsylvania | United States | 40.44472 | -78.84139 | 1896 | 7582 |
| Munhall | city | Pennsylvania | United States | 40.39222 | -79.90028 | 977 | 192581 |
| Munntown | city | Pennsylvania | United States | 40.23222 | -80.08972 | 1220 | 13695 |
| Munson | city | Pennsylvania | United States | 40.95472 | -78.17333 | 1496 | 4790 |
| Munster | city | Pennsylvania | United States | 40.46833 | -78.65444 | 1971 | 6636 |
| Murdock | city | Pennsylvania | United States | 39.95806 | -79.09917 | 1991 | 4416 |
| Murdocksville | city | Pennsylvania | United States | 40.47861 | -80.35611 | 997 | 4786 |
| Murray | city | Pennsylvania | United States | 40.49972 | -76.52806 | 528 | 4242 |
| Murray | city | Pennsylvania | United States | 41.47194 | -76.34417 | 1906 | 868 |
| Murrell | city | Pennsylvania | United States | 40.16861 | -76.1675 | 403 | 32784 |
| Murrinsville | city | Pennsylvania | United States | 41.14333 | -79.88417 | 1335 | 1931 |
| Murry Hill | city | Pennsylvania | United States | 40.27556 | -80.1575 | 1167 | 30330 |
| Murrysville | city | Pennsylvania | United States | 40.42833 | -79.69778 | 941 | 36611 |
| Muse | city | Pennsylvania | United States | 40.29278 | -80.20056 | 1095 | 28178 |
| Muse Junction | city | Pennsylvania | United States | 40.31306 | -80.19556 | 1190 | 28178 |
| Musellmans Crossing | city | Pennsylvania | United States | 41.09111 | -77.91917 | 1499 | 802 |
| Mushroom Farms | city | Pennsylvania | United States | 41.14667 | -75.35472 | 1899 | 4882 |
| Musselman Grove | city | Pennsylvania | United States | 40.29028 | -78.50528 | 1430 | 3128 |
| Musser | city | Pennsylvania | United States | 40.72611 | -77.98472 | 1197 | 3538 |
| Mustard | city | Pennsylvania | United States | 40.235 | -79.81889 | 1108 | 22245 |
| Mutchlertown subdivision | city | Pennsylvania | United States | 40.67583 | -75.23694 | 308 | 77102 |
| Mutual | city | Pennsylvania | United States | 40.23667 | -79.49778 | 1099 | 13652 |
| Muzette | city | Pennsylvania | United States | 41.47278 | -79.23389 | 1673 | 658 |
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