J
- (Westmeath) Jeffrystown
- (Wicklow) Jack White’s Cross Roads
- (Westmeath) Judgeville
- (Laois) Jamestown
- (Uíbh Fhailí) Jonestown Cross Roads
- (Kildare) Jackson’s Bridge
- (Wicklow) Johnstown
- (Westmeath) Joristown Upper
- (Westmeath) Joristown Lower
- (Wicklow) Johnstown Lower
- (Westmeath) Johnstown
- (Westmeath) Johnstown
- (Meath) Johnstown
- (Meath) Jamestown
- (Meath) Jordanstown
- (Meath) Johnstown
- (Meath) Jordanstown
- (Kilkenny) Jamestown
- (Wicklow) Johnstown North
- (Wicklow) Johnstown Upper
- (Kilkenny) Johnswell
- (Meath) Johnstown
- (Wexford) Johnstown
- (Kilkenny) Jenkinstown
- (Wicklow) Johnstown
- (Kilkenny) Jamestown
- (Wexford) Johnstown
- (Wexford) Johnstown
- (County Carlow) Johnduffswood
- (Kildare) Johnstown North