S
- (Mayo County) Srahmore
- (Mayo County) Srahataggle South
- (Mayo County) Sheskin
- (Mayo County) Sranataggle
- (Galway City) Salthill
- (Mayo County) Shiraghy Island
- (Mayo County) Seanachadh
- (Mayo County) Srahaderdaowon
- (Mayo County) Surgeview
- (Mayo County) Slievemore
- (Mayo County) Sand Hills
- (Mayo County) Srahnamanragh
- (County Galway) Spiddal
- (Mayo County) Shrule
- (Roscommon) Strokestown
- (Mayo County) Swinford
- (Sligo) Strandhill