K
- (An Cabhán) Killycluggin
- (An Cabhán) Killycreeny
- (County Monaghan) Knocks
- (An Cabhán) Killyvanny
- (An Cabhán) Killyconnan
- (An Cabhán) Killykeen
- (An Cabhán) Killyvally
- (An Cabhán) Kinagha
- (An Cabhán) Killylea
- (An Cabhán) Kilsob
- (An Cabhán) Killyvahan
- (County Donegal) Killea
- (County Donegal) Kilmonaster
- (County Donegal) Killindarragh
- (County Donegal) Killyclug
- (County Donegal) Kingarrow
- (County Donegal) Kilross
- (County Donegal) Knockletteragh
- (County Donegal) Kilclooney Bridge
- (County Monaghan) Kilmore
- (County Monaghan) Knockatallon
- (County Monaghan) Killanny
- (An Cabhán) Killyran
- (County Monaghan) Knockcor
- (County Monaghan) Killyneill Cross Roads
- (County Monaghan) Kildoagh
- (County Monaghan) Killina
- (County Monaghan) Kilnamaddy
- (County Monaghan) Killyleg
- (County Donegal) Kinnakillew