- Saggart
- Saint Johnstown
- Saleen
- Sallins
- Sallynoggin
- Sandyford
- Sandymount
- Scarriff
- Scarriff
- Schull
- Scotstown
- Shanagarry
- Shanagolden
- Shanbally
- Shanballymore
- Shankill
- Shannon
- Shannonbridge
- Shercock
- Shillelagh
- Shinrone
- Shrule
- Silvermines
- Sixmilebridge
- Skerries
- Skibbereen
- Slane
- Slieverue
- Sligo
- Smithborough
- Sneem
- Spa
- Spiddal
- Stamullin
- Stradbally
- Stradbally
- Straffan
- Strandhill
- Stratford
- Strokestown
- Summerhill
- Suncroft
- Sutton
- Swanlinbar
- Swinford
- Swords
