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| 01. | Oakdale | Pic | |
| 02. | Oakford | Pic | |
| 03. | Oakmont | Pic | |
| 04. | Oaks | Pic | |
| 05. | Oberlin | Pic | |
| 06. | Ohiopyle | Pic | |
| 07. | Oil City | Pic | |
| 08. | Oley | Pic | |
| 09. | Oliver | Pic | |
| 10. | Olyphant | Pic | |
| 11. | Orangeville | Pic | |
| 12. | Orbisonia | Pic | |
| 13. | Oreland | Pic | |
| 14. | Orrtanna | Pic | |
| 15. | Orson | Pic | |
| 16. | Orwigsburg | Pic | |
| 17. | Osceola Mills | Pic | |
| 18. | Osterburg | Pic | |
| 19. | Ottsville | Pic | |
| 20. | Oxford | Pic |
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Last update: 2003.01.08