- Sackets Harbor
- Saddle Rock
- Saddle Rock Estates
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- Sagaponack
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- Saint James
- Saint Johnsville
- Saint Regis Falls
- Salamanca
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- Salisbury
- Salisbury Mills
- Salt Point
- Saltaire
- Sanborn
- Sand Ridge
- Sands Point
- Sandy Creek
- Saranac Lake
- Saratoga Springs
- Saugerties
- Saugerties South
- Savannah
- Savona
- Sayville
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- Schenevus
- Schoharie
- Schroon Lake
- Schuylerville
- Scio
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- Scotia
- Scotts Corners
- Scottsburg
- Scottsville
- Sea Cliff
- Seaford
- Searingtown
- Seaside
- Selden
- Seneca Falls
- Seneca Knolls
- Setauket-East Setauket
- Sharon Springs
- Sheepshead Bay
- Shelter Island
- Shelter Island Heights
- Shenorock
- Sherburne
- Sherman
- Sherrill
- Shinnecock Hills
- Shirley
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- Sidney
- Silver Creek
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- Sinclairville
- Skaneateles
- Sleepy Hollow
- Sloan
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- Smallwood
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- Smyrna
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- Sodus
- Sodus Point
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- South Valley Stream
- Southampton
- Southold
- Southport
- Spackenkill
- Sparkill
- Sparrow Bush
- Speculator
- Spencer
- Spencerport
- Spring Valley
- Springfield
- Springfield Gardens
- Springs
- Springville
- Springwater Hamlet
- Spuyten Duyvil
- Staatsburg
- Stamford
- Stannards
- Stapleton
- Star Lake
- Staten Island
- Steinway
- Stewart Manor
- Stillwater
- Stone Ridge
- Stony Brook
- Stony Point
- Stottville
- Strykersville
- Suffern
- Sunnyside
- Sunset Bay
- Sunset Park
- Swain
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- Sylvan Beach
- Syosset
- Syracuse
