Barrios de Pennsylvania O

• Oak Lane-East Oak Lane (9)
• Oakwood (1)
• Old City (56)
• Old Orchard (1)
• Old Uptown Harrisburg (7)
• Olde Kensington (68)
• Olney (22)
• Orchard Park (8)
• Outer Kenhorst/Shillington (2)
• Outer Lancaster (49)
• Outer Wilkes-Barre (8)
• Outer York/Valley View/Grantley (9)
• Outlet Area (2)
• Outlying South Allegheny (15)
• Overbrook (1)
• Overbrook (50)
• Oxford Circle-Castor (25)