Pennsylvania
| Category: | State |
| Key: | PA |
| Timezone: | Eastern (UTC -5/-4) |
| Nickname: | Keystone State |
| Homepage: | www.pa.gov |
| Cities: | 1818 |
Cities in Pennsylvaniasorted by first letter: A B C D E F G H I J K L M N O P Q R S T U V W Y Z |
|
| Oakdale | Oakmont |
| Ohiopyle | Oliver |
| Oliveburg | Oak Ridge |
| Oil City | Osceola Mills |
| Osterburg | Olanta |
| Orviston | Osceola |
| Oakland Mills | Ono |
| Orbisonia | Orrstown |
| Orrtanna | Orangeville |
| Orwigsburg | Old Zionsville |
| Orefield | Oneida |
| Olyphant | Orson |
| Old Forge | Ottsville |
| Oreland | Oxford |
| Oaks | Oley |