Travelers are voting Ashtown Castle, Clontarf Castle and Drimnagh Castle as the best of 4 castles in Dublin. There are 4 castles in Dublin a city just 32 km from Dublin and 1 castle in Kilkenny which is 125 km distant. The most popular of these are Ashtown Castle in Dublin and Kilkenny Castle in Kilkenny. You can find 9 Castle in the country of Ireland and Kilkenny Castle is our members favorite Castle in all of Ireland. Want more? Check out our map of castles in Dublin.