Pennsylvania Neighborhoods O
- Oak Lane-East Oak Lane (10)
- Oakwood (1)
- Old City (54)
- Old Orchard (1)
- Old Uptown Harrisburg (7)
- Olde Kensington (65)
- Olney (26)
- Orchard Park (8)
- Outer Kenhorst/Shillington (1)
- Outer Lancaster (47)
- Outer Wilkes-Barre (7)
- Outer York/Valley View/Grantley (4)
- Outlet Area (2)
- Outlying South Allegheny (15)
- Overbrook (2)
- Overbrook (49)
- Oxford Circle-Castor (24)