1. Mansfield, Pennsylvania, USA
2. McKean County, Pennsylvania, USA
3. McKeesport, Pennsylvania, USA
4. Meadville, Pennsylvania, USA
5. Mechanicsburg, Pennsylvania, USA
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6. Middletown, Pennsylvania, USA
7. Mill Village, Pennsylvania, USA
8. Millcreek Township, Pennsylvania, USA
9. Millport, Pennsylvania, USA
10. Montgomery, Pennsylvania, USA
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11. Montoursville, Pennsylvania, USA
12. Montrose, Pennsylvania, USA
13. Moosic, Pennsylvania, USA (2)
14. Moscow, Pennsylvania, USA
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