I
- (Clare) Inishmacowney
- (Kerry) Inch
- (Kerry) Inishnabro
- (Kerry) Inishtooskert
- (Kerry) Inishvickillane
- (Clare) Illaunaclaggin
- (Clare) Illaunmore
- (Clare) Illaunawhilla
- (Kerry) Inch-West
- (Kerry) Inch-Moor
- (Kerry) Islandmacloughry
- (Kerry) Islandganniv
- (Kerry) Inchee
- (County Cork) Illanebeg
- (County Cork) Inchantatane
- (County Cork) Islanday
- (County Cork) Inchileigh Bridge
- (County Cork) Inches
- (County Cork) Inishleena
- (County Cork) Inishcarra Bridge
- (County Cork) Inchisine
- (Kerry) Inchinapoagh
- (Limerick City and County Council) Inchinalyra
- (Kerry) Inchicorrigane
- (Kerry) Innisfallen
- (County Cork) Inch
- (Kerry) Inchec Bridge
- (Kerry) Inchinglanna
- (Kerry) Illaundrane
- (Kerry) Inishtooskert