S
- Saegertown
- St. Clair
- St. Clairsville
- St. Lawrence
- St. Petersburg
- Salisbury
- Salladasburg
- Saltillo
- Saltsburg
- Sandy Lake
- Sankertown
- Saxonburg
- Saxton
- Sayre
- Scalp Level
- Schellsburg
- Schuylkill Haven
- Schwenksville
- Scottdale
- Selinsgrove
- Sellersville
- Seven Fields
- Seven Springs
- Seven Valleys
- Seward
- Sewickley
- Sewickley Heights
- Sewickley Hills
- Shade Gap
- Shamokin Dam
- Shanksville
- Sharon Hill
- Sharpsburg
- Sharpsville
- Sheakleyville
- Shelocta
- Shenandoah
- Shickshinny
- Shillington
- Shinglehouse
- Shippensburg
- Shippenville
- Shippingport
- Shiremanstown
- Shirleysburg
- Shoemakersville
- Shrewsbury
- Silverdale
- Sinking Spring
- Slatington
- Sligo
- Slippery Rock
- Smethport
- Smicksburg
- Smithfield
- Smithton
- Snow Shoe
- S.N.P.J.
- Snydertown
- Somerset
- Souderton
- South Bethlehem
- South Coatesville
- South Connellsville
- South Fork
- South Greensburg
- South Heights
- Southmont
- South New Castle
- South Philipsburg
- South Renovo
- South Waverly
- Southwest Greensburg
- South Williamsport
- Spartansburg
- Speers
- Springboro
- Spring City
- Springdale
- Spring Grove
- Starrucca
- State College
- Steelton
- Stewartstown
- Stillwater
- Stockdale
- Stockertown
- Stoneboro
- Stoystown
- Strasburg
- Strattanville
- Strausstown
- Stroudsburg
- Sugarcreek
- Sugar Grove
- Sugar Notch
- Summerhill
- Summerville
- Summit Hill
- Susquehanna Depot
- Sutersville
- Swarthmore
- Swissvale
- Swoyersville
- Sykesville
- Sylvania
Read more about this topic: List Of Towns And Boroughs In Pennsylvania