S
- (An Cabhán) Scarvy Bridge
- (An Cabhán) Stragelliff
- (An Cabhán) Snakeel
- (An Cabhán) Straheglin
- (An Cabhán) Sralahan
- (County Donegal) Saints Island
- (An Cabhán) Summerville
- (County Donegal) Stroove
- (County Donegal) Stranorlar
- (An Cabhán) Stradone
- (County Donegal) Stookaruddan
- (County Monaghan) Stone Bridge
- (County Donegal) Station Island
- (An Cabhán) Spear Vale
- (County Donegal) Soppog
- (County Donegal) Single Street
- (County Monaghan) Silver Stream
- (County Monaghan) Shantonagh
- (An Cabhán) Scrabby
- (County Donegal) Straruddan
- (County Donegal) Stream’s Town
- (County Donegal) Stranagoppoge
- (County Donegal) Srath
- (County Donegal) Strahack
- (County Donegal) Speenoge
- (County Donegal) Shellbrook
- (County Donegal) Sessiagh
- (County Donegal) Seedagh
- (County Donegal) Stranarva
- (County Donegal) Shanbally