UpAlphabetical listing of Places in Pennsylvania
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
| Osborn | city | Pennsylvania | United States | 41.46 | -80.29 | 1669 | |
| Osborne | city | Pennsylvania | United States | 40.53 | -80.17 | 846 | |
| Osburn | city | Pennsylvania | United States | 40.30 | -79.36 | 1017 | |
| Oscar | city | Pennsylvania | United States | 40.84 | -79.37 | 1108 | |
| Osceola | city | Pennsylvania | United States | 41.98 | -77.34 | 1197 | |
| Osceola Mills | city | Pennsylvania | United States | 40.85 | -78.27 | 1669 | |
| Osgood | city | Pennsylvania | United States | 41.44 | -80.37 | 997 | |
| Oshanter | city | Pennsylvania | United States | 40.94 | -78.46 | 1669 | |
| Ostend | city | Pennsylvania | United States | 40.87 | -78.72 | 1669 | |
| Osterburg | city | Pennsylvania | United States | 40.17 | -78.52 | 1190 | |
| Osterhout | city | Pennsylvania | United States | 41.51 | -75.90 | 830 | |
| Oswayo | city | Pennsylvania | United States | 41.92 | -78.02 | 1699 | |
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