I
- (Clare) Inishdea
- (Clare) Islandovanna
- (Clare) Inishdadroum
- (Clare) Illaunbeg
- (Clare) Inishtubbrid
- (Clare) Inishmarry
- (Limerick City and County Council) Islandmore
- (County Cork) Illaunbweeheen
- (Clare) Illaunonearaun
- (Limerick City and County Council) Inchabaun
- (Kerry) Inch Bridge
- (County Tipperary) Inchirourke
- (County Tipperary) Islands Bridge
- (County Tipperary) Inchinsquillib
- (Limerick City and County Council) Inch
- (County Waterford) Islandtarsney
- (County Waterford) Islandikane
- (County Tipperary) Innislonagh
- (County Waterford) Inchindrisla
- (Clare) Inishmore
- (County Tipperary) Inane
- (County Tipperary) Inch
- (County Cork) Inchamay
- (County Cork) Inchibeg Bridge
- (County Cork) Inishbeg
- (County Cork) Inishcarra
- (Clare) Inishcorker
- (County Cork) Inishfarnard
- (Clare) Inishloe
- (Clare) Inishmacnaghtan