R
- (County Cork) Rockmills
- (Limerick City and County Council) Rockhill
- (County Cork) Rockchapel
- (County Cork) Roaninish
- (County Cork) Roancarrig More
- (County Cork) Roancarrig Beg
- (Clare) Roadford
- (County Tipperary) Riverstown
- (County Cork) Riverstown
- (Clare) Rinneen
- (Clare) Rinnagonnaght
- (County Cork) Ringaskiddy Island
- (County Cork) Ringarogy Island
- (Clare) Rineanna
- (County Cork) Rerrin
- (County Tipperary) Renaghmore
- (Kerry) Releagh Bridge
- (County Cork) Releagh
- (Limerick City and County Council) Reens
- (Kerry) Reenroe
- (Kerry) Reenard
- (County Cork) Redforge Cross Roads
- (County Tipperary) Rear Cross
- (County Cork) Reanascreena
- (County Cork) Reananerree
- (County Waterford) Rathgormack
- (Kerry) Rathea
- (County Cork) Rathduff
- (County Cork) Rathcoursey
- (County Tipperary) Rathclarish