| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Orange | city | Pennsylvania | United States | 41.38861 | -75.89389 | 1181 | 8027 |
| Orangeville | city | Pennsylvania | United States | 41.07806 | -76.41472 | 682 | 11346 |
| Orbisonia | city | Pennsylvania | United States | 40.24278 | -77.89333 | 698 | 1833 |
| Orchard Beach | city | Pennsylvania | United States | 42.24139 | -79.82889 | 652 | 8137 |
| Orchard Courts | city | Pennsylvania | United States | 40.18333 | -75.52167 | 190 | 43341 |
| Orchard Crest | city | Pennsylvania | United States | 40.21417 | -76.98639 | 406 | 58438 |
| Orchard Hill | city | Pennsylvania | United States | 40.14694 | -79.52861 | 1197 | 15373 |
| Orchard Hill | city | Pennsylvania | United States | 39.97444 | -76.61861 | 652 | 23578 |
| Orchard Hills | city | Pennsylvania | United States | 40.58611 | -79.53167 | 1102 | 15521 |
| Orchard Terrace | city | Pennsylvania | United States | 40.17 | -76.98056 | 400 | 43610 |
| Ore Hill | city | Pennsylvania | United States | 40.29361 | -78.40111 | 1499 | 7918 |
| Ore Valley | city | Pennsylvania | United States | 39.93139 | -76.6575 | 603 | 49628 |
| Orefield | city | Pennsylvania | United States | 40.63472 | -75.58472 | 400 | 18652 |
| Oregon | city | Pennsylvania | United States | 40 | -76.24528 | 396 | 24179 |
| Oregon Hill | city | Pennsylvania | United States | 41.52417 | -77.30722 | 1788 | 447 |
| Oreland | city | Pennsylvania | United States | 40.11833 | -75.17806 | 265 | 205765 |
| Oreminea | city | Pennsylvania | United States | 40.40472 | -78.25556 | 1368 | 4493 |
| Oreville | city | Pennsylvania | United States | 40.51861 | -75.69028 | 495 | 11834 |
| Orient | city | Pennsylvania | United States | 39.95111 | -79.85417 | 997 | 9796 |
| Oriental | city | Pennsylvania | United States | 40.63333 | -77.00639 | 501 | 2731 |
| Oriole | city | Pennsylvania | United States | 41.14111 | -77.21028 | 790 | 4164 |
| Ormrod | city | Pennsylvania | United States | 40.67111 | -75.55528 | 410 | 25036 |
| Ormsby | city | Pennsylvania | United States | 41.80889 | -78.54194 | 2198 | 1489 |
| Orners Corner | city | Pennsylvania | United States | 40.55833 | -78.39083 | 1249 | 46161 |
| Orrstown | city | Pennsylvania | United States | 40.05861 | -77.61028 | 610 | 5592 |
| Orrtanna | city | Pennsylvania | United States | 39.845 | -77.36111 | 748 | 3385 |
| Orson | city | Pennsylvania | United States | 41.81361 | -75.44833 | 2024 | 998 |
| Orvilla | city | Pennsylvania | United States | 40.26639 | -75.2925 | 298 | 71559 |
| Orville | city | Pennsylvania | United States | 40.54972 | -79.78417 | 807 | 58178 |
| Orviston | city | Pennsylvania | United States | 41.10639 | -77.7525 | 898 | 1983 |
| Orwell | city | Pennsylvania | United States | 41.88389 | -76.2775 | 1410 | 1387 |
| Orwig | city | Pennsylvania | United States | 39.76083 | -76.62833 | 820 | 13800 |
| Orwigsburg | city | Pennsylvania | United States | 40.65472 | -76.10111 | 656 | 10480 |
| Orwin | city | Pennsylvania | United States | 40.58389 | -76.53306 | 797 | 4451 |
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