South Dublin South Dublin South Dublin () is a county in Ireland, within the province of Leinster, and the Dublin Region, a successor to County Dublin, from which its name derives. South Dublin County Council is the local authority for the county. The county contains both dense suburbs of Dublin and stretches of unpopulated mountain. In 2011 it had a population of 278,749, making it the third most populous county in the state. South Dublin has an area of 222.74 square kilometres. It is bounded by Dublin City (15 km to the north east), the River Liffey (separating it from Fingal to
Milltown, Dublin formerly the seminary of the Marist Fathers. Milltown, Dublin Milltown () is a suburb on the southside of Dublin, Ireland. The townland got its name well before the 18th or 19th century. Both Milltown and Clonskeagh were "Liberties" of Dublin, following the English invasion and colonisation in 1290. Milltown was the site of several working mills on the River Dodder and is also the location of the meeting of the River Slang with the Dodder. A mill race was taken from just above the weir located 100m downstream from the 'Nine Arches' viaduct. It ran beside what is now the