S
- (County Donegal) Straboy
- (County Donegal) Sheskinapoll
- (County Donegal) Seacor
- (County Donegal) Sockar
- (County Donegal) Stralongford
- (County Donegal) Stracashel
- (County Donegal) Shallogan
- (County Donegal) Sandfield
- (County Donegal) Shanaghan
- (County Donegal) Sallybrook
- (County Donegal) Stranagartan
- (County Donegal) Straleel North
- (County Donegal) Straleel
- (County Donegal) Shalwy
- (County Donegal) Stravally
- (County Donegal) Saint Catherines
- (County Donegal) Sir Albert’s Bridge
- (County Donegal) Shannagh
- (County Monaghan) Scotch Corner
- (An Cabhán) Sraloaghan
- (An Cabhán) Sruhanagh
- (County Monaghan) Shanco
- (County Monaghan) Sheskin
- (County Monaghan) Selloo
- (County Monaghan) Slieveroe
- (County Monaghan) Swans Cross Roads
- (County Monaghan) Shanmullagh
- (County Donegal) Slievebane
- (County Monaghan) Sheetrim
- (County Monaghan) Shanco