I
- (Laois) Ironmills Bridge
- (Meath) Iskaroon
- (Meath) Iskaroon Little
- (Meath) Irishtown
- (Meath) Inan
- (Laois) Inchacooly
- (Wicklow) Intack
- (Kildare) Irishtown
- (Laois) Inch Cross Roads
- (Uíbh Fhailí) Idle Corner
- (Uíbh Fhailí) Inckaroe Cross Roads
- (Laois) Inchanisky
- (Laois) Iry
- (Uíbh Fhailí) Incherky
- (Kilkenny) Islands
- (County Carlow) Island
- (Kilkenny) Inchbeg
- (Kilkenny) Inchanaglogh
- (Wexford) Island Bridge
- (Wexford) Inch
- (Wexford) Inish
- (Wexford) Inch
- (Kildare) Inchaquire
- (An Longfort) Inchcleraun
- (Westmeath) Inchmore
- (An Longfort) Inchmore
- (Westmeath) Inchturk
- (Wexford) Inish
- (Meath) Irishford
- (Kilkenny) Inistioge