I
- (County Cork) Illane
- (County Tipperary) Inchnamuck
- (County Cork) Insnasallagh
- (County Cork) Inchinapallas
- (County Cork) Ileclash
- (County Cork) Ightermurragh
- (County Cork) Innygraga
- (Kerry) Illaunnacusha
- (Kerry) Illaunstookagh
- (Kerry) Illaunimmil
- (Kerry) Illauntannig
- (Kerry) Inchiclogh
- (County Cork) Inchinossig Bridge
- (County Waterford) Island
- (County Cork) Inchicahan Cross Roads
- (County Cork) Inishleigh
- (County Cork) Inchintaglin Bridge
- (Kerry) Inishfoyle
- (Kerry) Illaunslea
- (Kerry) Inishkeragh
- (Kerry) Illaunamadan
- (Kerry) Inishikeelaghmore
- (Kerry) Illaunleagh
- (Kerry) Illaunsillagh
- (Kerry) Illaunnaweelaun
- (Clare) Illaunbaun
- (Clare) Illaunhobert
- (Clare) Inishparran
- (Clare) Illaunloo
- (Kerry) Illaunnacogha