List of places in Pennsylvania: O

This list of cities, towns, unincorporated communities, counties, and other recognized places in the U.S. state of Pennsylvania also includes information on the number and names of counties in which the place lies, and its lower and upper zip code bounds, if applicable.


Name of place Number of counties Principal county Lower zip code Upper zip code
Oak Forest 1 Greene County 15370  
Oak Grove 1 Adams County    
Oak Grove 1 Clearfield County 16858  
Oak Grove 1 Monroe County    
Oak Grove 1 Montour County    
Oak Grove 1 Schuylkill County 17963  
Oak Grove 1 Washington County    
Oak Grove 1 Westmoreland County 15658  
Oak Hall 1 Centre County 16827  
Oak Hill 1 Allegheny County 15137 15145
Oak Hill 1 Clearfield County 16845  
Oak Hill 1 Lackawanna County 18507  
Oak Hill 1 Lancaster County    
Oak Hill 1 Venango County    
Oak Hills 1 Butler County    
Oak Lane 1 Montgomery County 19012  
Oak Lane 1 Philadelphia County 19126  
Oak Park 1 Montgomery County 19446  
Oak Park 1 Northumberland County 17857  
Oak Ridge 2 Armstrong County 16245  
Oak Ridge 1 Clearfield County    
Oak Shade 1 Lancaster County 17566  
Oak Tree 1 Indiana County    
Oakbottom 1 Lancaster County 17566  
Oakbourne 1 Chester County    
Oakbrook 1 Berks County    
Oakdale 1 Allegheny County 15071  
Oakdale 1 Luzerne County 18224  
Oakford 1 Bucks County 19053  
Oakhurst 1 Cambria County    
Oakland 1 Allegheny County 15213  
Oakland 1 Armstrong County    
Oakland 1 Cambria County    
Oakland 1 Lawrence County 16101  
Oakland 1 Mercer County    
Oakland 1 Susquehanna County 18847  
Oakland Beach 1 Crawford County 16316  
Oakland Mills 1 Juniata County 17076  
Oakland Township 1 Butler County    
Oakland Township 1 Susquehanna County    
Oakland Township 1 Venango County    
Oaklane Manor 1 Montgomery County 19012  
Oakleigh 1 Dauphin County 17111  
Oakley 1 Susquehanna County    
Oaklyn 1 Northumberland County 17801  
Oakmont 1 Allegheny County 15139  
Oakmont 1 Cambria County 15904  
Oakmont 1 Delaware County 15139  
Oakryn 1 Lancaster County 17563  
Oaks 1 Montgomery County 19456  
Oaktree Hollow 1 Bucks County    
Oakvale Boulevard 1 Butler County 16002  
Oakville 1 Cumberland County 17257  
Oakville 1 Westmoreland County 15650  
Oakwood 1 Lawrence County    
Obelisk 1 Montgomery County 19492  
Oberlin 1 Dauphin County 17113  
Oberlin Gardens 1 Dauphin County 17113  
Obold 1 Berks County    
Ochre Mill 1 Luzerne County    
Odell 1 Washington County    
Odenthal 1 Cambria County 15946  
Odenwelder 1 Northampton County 18042  
Odin 1 Potter County 16915  
O'Donnell 1 Jefferson County    
Ogden 1 Delaware County 19061  
Ogden Park 1 Delaware County 19062  
Ogdensburg 1 Tioga County 17765  
Ogdonia 1 Sullivan County    
Ogle 1 Butler County 16046  
Ogle Township 1 Somerset County    
Ogletown 1 Somerset County 15963  
Ogontz 1 Montgomery County 19117  
O'Hara Township 1 Allegheny County    
Ohio Township 1 Allegheny County    
Ohio Township 1 Beaver County    
Ohiopyle 1 Fayette County 15470  
Ohioview 1 Beaver County 15052  
Ohioville 1 Beaver County 15059  
Ohl 1 Jefferson County 15864  
Oil City 1 Cambria County 15925  
Oil City 1 Venango County 16301  
Oil Creek 1 Venango County 16301  
Oil Creek Township 1 Crawford County    
Oilcreek Township 1 Venango County    
Oklahoma 1 Clearfield County 15801  
Oklahoma 1 Westmoreland County 15613  
Okome 1 Lycoming County 17739  
Olanta 1 Clearfield County 16863  
Old Boston 1 Luzerne County 18641  
Old Clarendon 1 Warren County 16313  
Old Concord 1 Washington County 15329  
Old Crabtree 1 Westmoreland County 15650  
Old Cranberry 1 Luzerne County    
Old Enon 1 Lawrence County 16120  
Old Forge 1 Delaware County 19060  
Old Forge 1 Franklin County    
Old Forge 1 Lackawanna County 18518  
Old Fort 1 Centre County    
Old Frame 1 Fayette County 15478  
Old Furnace 1 Beaver County    
Old Junction 1 Somerset County 15501  
Old Line 1 Lancaster County 17545  
Old Lycoming Township 1 Lycoming County    
Old Meadow 1 Westmoreland County 15683  
Old Mountain House 1 Fulton County    
Old Orchard 1 Northampton County 18042  
Old Port 1 Juniata County 17082  
Old Shade Furnace 1 Somerset County    
Old Side 1 Centre County    
Old Stanton 1 Westmoreland County 15672  
Old Zionsville 1 Lehigh County 18068  
Old Zollarsville 1 Washington County    
Oleona 1 Potter County    
Oleopolis 1 Venango County 16301  
Oley 1 Berks County 19547  
Oley Furnace 1 Berks County 19522 19547
Oley Line 1 Berks County 19547  
Oley Township 1 Berks County    
Oliphant Furnace 1 Fayette County 15401  
Oliveburg 1 Jefferson County 15764  
Oliver 1 Fayette County 15472  
Oliver Mills 1 Luzerne County    
Oliver Township 1 Jefferson County    
Oliver Township 1 Mifflin County    
Oliver Township 1 Perry County    
Olivers Mills 1 Luzerne County 18702  
Olivet 1 Armstrong County 15618  
Olmsted 1 Potter County    
Olmsville 1 Tioga County    
Olney 1 Philadelphia County 19120  
Olyphant 1 Lackawanna County 18447  
Onberg 1 Indiana County 15701  
Oneida 1 Butler County 16001  
Oneida 1 Schuylkill County 18242  
Oneida Junction 1 Luzerne County 18201  
Oneida Township 1 Huntingdon County    
Oniontown 1 Mercer County    
Onnalinda 1 Cambria County 15921  
Ono 1 Lebanon County 17077  
Onspaugh Corners 1 Crawford County    
Ontario 1 Washington County 15324  
Ontelaunee 1 Berks County 19605  
Ontelaunee Township 1 Berks County    
Opp 1 Lycoming County 17756  
Oppenheimer 1 Bedford County    
Oppermans Corner 1 Chester County 19425  
Option 1 Allegheny County 15236  
Orange 1 Luzerne County 18612  
Orange Township 1 Columbia County    
Orangeville 1 Columbia County 17859  
Orbisonia 1 Huntingdon County 17243  
Orchard Beach 1 Erie County 16428  
Orchard Crest 1 Cumberland County    
Orchard Crossing 1 Blair County 16686  
Orchard Hill 1 Westmoreland County 15666  
Orchard Hills 1 Armstrong County 15613  
Orchard Hills 1 Delaware County 19063  
Orchard Park 1 Lancaster County 17601  
Ore Hill 1 Blair County 16673  
Ore Valley 1 York County 17403  
Orefield 1 Lehigh County 18069  
Oregon 1 Lancaster County 17540  
Oregon Hill 1 Lycoming County 16938  
Oregon Township 1 Wayne County    
Oreland 1 Montgomery County 19075  
Oreminea 1 Blair County 16693  
Oreville 1 Berks County 19539  
Orient 1 Fayette County 15420  
Oriental 1 Juniata County 17045  
Oriole 1 Lycoming County 17740  
Ormrod 1 Lehigh County 18037  
Ormsby 1 McKean County 16726  
Orners Corner 1 Blair County 16601  
Orrstown 1 Franklin County 17244  
Orrtanna 1 Adams County 17353  
Orrton 1 Berks County    
Orrville 1 Allegheny County 15144  
Orson 1 Wayne County 18449  
Orvilla 1 Montgomery County 19440  
Orville 1 Allegheny County 15144  
Orviston 1 Centre County 16864  
Orwell 1 Bradford County 18837  
Orwell Township 1 Bradford County    
Orwig 1 York County    
Orwigsburg 1 Schuylkill County 17961  
Orwin 1 Schuylkill County 17980  
Osborn 1 Mercer County    
Osborne 1 Allegheny County 15143  
Oscar 1 Armstrong County    
Osceola 1 Clearfield County    
Osceola 1 Tioga County 16942  
Osceola Mills 1 Clearfield County 16666  
Osceola Township 1 Tioga County    
Osgood 1 Mercer County 16125  
Oshanter 1 Clearfield County 16830  
Ostend 1 Clearfield County 15757  
Osterburg 1 Bedford County 16667  
Osterhout 1 Wyoming County 18657  
Oswayo 1 Potter County 16915  
Oswayo Township 1 Potter County    
Ott Town 1 Bedford County 15537  
Ottawa 1 Montour County 17821  
Otter Creek Township 1 Mercer County    
Otterbein 1 Franklin County    
Otto 1 Northumberland County    
Otto Township 1 McKean County    
Ottown 1 Bedford County 15537  
Ottsville 1 Bucks County 18942  
Outcrop 1 Fayette County 15478  
Outlet 1 Luzerne County 18612  
Outwood 1 Schuylkill County 17963  
Oval 1 Lycoming County 17759  
Overbrook 1 Allegheny County    
Overbrook 1 Philadelphia County 19151  
Overbrook Hills 1 Montgomery County 19151  
Overfield Township 1 Wyoming County    
Overholt Acres 1 Westmoreland County 15642  
Overleigh 1 Montgomery County 19004  
Overlook 1 Lancaster County 17601  
Overlook 1 Northumberland County    
Overlook Heights 1 Centre County    
Overlook Springs 1 Lehigh County    
Overshot 1 Bradford County    
Overton 1 Bradford County 18833  
Overton Township 1 Bradford County    
Overview 1 Cumberland County 17053  
Owassee 1 Tioga County    
Owens Corners 1 Erie County    
Owensdale 1 Fayette County 15425  
Owl Hollow 1 Bradford County    
Owls Nest 1 Elk County    
Owltown 1 Venango County    
Oxford 1 Chester County 19363  
Oxford Township 1 Adams County    
Oxford Valley 1 Bucks County    
Oyster Point 1 Lancaster County 17601