- Iaráirne
- Illaunaleama
- Illaunamid
- Illaunananima
- Illaunanaur
- Illaunaneel
- Illaunanownim
- Illaunard
- Illaunarroghnut
- Illauneeragh
- Illauneeragh West
- Illaungorm
- Illaunmore
- Illaunnacroagh
- Illaunnagappul
- Illaunroe
- Illaunurra
- Inchacommaun Islands
- Inchaghaun
- Inchagoill
- Inchamakinna
- Inchamore
- Inchiquin
- Inishbarra
- Inishbigger
- Inishbofin
- Inishbroon
- Inishcorra
- Inishdala Islands
- Inishdalla