Places beginning with RO in Pennsylvania, United States
- Roadside
- Roaring Branch
- Roaring Brook
- Roaring Brook, Township of
- Roaring Creek
- Roaring Creek, Township of
- Roaring Spring
- Roaring Spring, Borough of
- Robb
- Robbins
- Roberts
- Robertsdale
- Robertsville
- Robeson Crossing
- Robeson Extension
- Robesonia
- Robesonia, Borough of
- Robeson, Township of
- Robindale Heights
- Robindale (historical)
- Robin Heights
- Robin Hood Lakes
- Robinson
- Robinson
- Robinson
- Robinson, Township of
- Robinson, Township of
- Robinsonville
- Roboda
- Rocherty
- Rochester
- Rochester Mills
- Rochester, Township of
- Rockdale
- Rockdale
- Rockdale
- Rockdale
- Rockdale
- Rockdale
- Rockdale
- Rockdale Acres
- Rockdale, Township of
- Rockefeller, Township of
- Rockey
- Rock Falls Park
- Rockford Heights
- Rock Glen
- Rockhill
- Rockhill
- Rock Hill
- Rockhill Furnace, Borough of
- Rockhill Station
- Rockland
- Rockland
- Rockland, Township of
- Rockland, Township of
- Rockledge
- Rockledge, Borough of
- Rocklyn
- Rockmere
- Rock Point
- Rockport
- Rockspring
- Rocks Works
- Rocks Works
- Rockton
- Rocktown
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockville
- Rockwood
- Rockwood
- Rockwood, Borough of
- Rockwood Station
- Rocky Forest
- Rocky Grove
- Rocky Hill
- Rocky Ridge
- Rocky Valley
- Rodi
- Rodman
- Rodney
- Roeders
- Roedersville
- Roelofs
- Roemersville
- Rogers Mill
- Rogers Stop
- Rogerstown
- Rogersville
- Rogertown
- Rohrerstown
- Rohrsburg
- Roler
- Rolfe
- Rolling Hill Acres
- Rolling Stone
- Romania
- Romansville
- Rome
- Rome, Borough of
- Rome, Township of
- Rome, Township of
- Romney
- Romola
- Ronco
- Ronks
- Rook
- Roots
- Rootville
- Rosas
- Roscoe
- Roscoe, Borough of
- Roseann
- Roseboro
- Rosebud
- Roseburg
- Roseburg
- Rosecrans
- Rosedale
- Rosedale
- Rosedale
- Rosegarden
- Rose Garden
- Rose Gardens
- Roseglen
- Rose Glen
- Rosemont
- Rosemont Terrace (subdivision)
- Rosemount
- Rosengrant
- Rose Point
- Roses
- Roseto
- Roseto, Borough of
- Rose, Township of
- Rose Tree
- Rose Valley
- Rose Valley
- Rose Valley, Borough of
- Roseville
- Roseville
- Roseville
- Roseville
- Roseville, Borough of
- Rosewood Park
- Roslyn
- Roslyn Heights
- Ross Common
- Rossford
- Rossiter
- Rossland
- Rosslyn Farms
- Rosslyn Farms, Borough of
- Rossmere
- Rossmoyne
- Rossmoyne
- Rossmoyne Manor
- Rosston
- Ross, Township of
- Ross, Township of
- Ross, Township of
- Rostraver, Township of
- Rostrover, Township of
- Rote
- Rothruck
- Rothsville
- Rough and Ready
- Roulette
- Roulette, Township of
- Round Head
- Round Knob
- Roundtop
- Roundtop
- Round Top
- Round Top Manor
- Roundtown
- Rouseville
- Rouseville, Borough of
- Rouzerville
- Rowena
- Rowenna
- Rowes Run
- Rowland
- Rowtown
- Roxborough
- Roxbury
- Roxbury
- Roxbury
- Roxbury
- Royal
- Royalton
- Royalton, Borough of
- Royer
- Royersford
- Royersford, Borough of
- Roystone
- Roytown