K
- (County Monaghan) Killycrom
- (County Monaghan) Kiltybegs
- (An Cabhán) Kilcrossduff
- (An Cabhán) Kilmacaran
- (An Cabhán) Knappagh House
- (An Cabhán) Kilnacrew
- (An Cabhán) Knockbride
- (An Cabhán) Kilnacreevy
- (County Donegal) Kilgoly
- (County Donegal) Kindrum
- (County Donegal) Kincasslagh
- (An Cabhán) Killinkere
- (County Monaghan) Killeevan
- (An Cabhán) Killavally
- (An Cabhán) Kill
- (An Cabhán) Kilgolagh
- (An Cabhán) Kildorragh
- (County Donegal) Kildoney
- (County Donegal) Kilcroghery
- (An Cabhán) Kilconny
- (An Cabhán) Kilcogy
- (County Donegal) Kilclooney
- (County Donegal) Kindroghed
- (County Donegal) Knockfola
- (County Donegal) Kildaragh
- (County Donegal) Killyverry
- (County Donegal) Kinnagoe
- (County Donegal) Kindrohid
- (County Donegal) Keenagh
- (County Donegal) Knockbrack