Wikipedia
Tallaght ( ; , ) is the largest town, and county seat, of South Dublin, Ireland. The village area, dating from at least the 17th century, held one of the earliest settlements known in the southern part of the island, and one of medieval Ireland's more important monastic centres.
Up to the 1960s Tallaght was little more than a small village in County Dublin, linked to several nearby rural areas which were part of the large civil parish of the same name - the local council estimates the then population at 2,500. Suburban development began in the 1970s and a town centre area has been developing since the late 1980s. There is no legal definition of the boundaries of Tallaght, but the electoral divisions known as "Tallaght" followed by the name of a locality have, according to the 2011 census, a population of 69,454. There have been calls in recent years for Tallaght to be declared a city. In 2011 the nickname "Tallafornia" caught on based off a TV Show. On February 23, 2016 Tallaght got its first Geofilter on the social media app Snapchat, following a second Geofilter for Central Tallaght on March 11, 2016, both created by Jessy Nolan.
The village core of the district is located north of, and near to, the River Dodder, and parts of the broader area within South Dublin are close to the borders of Dublin City, Kildare, Dún Laoghaire–Rathdown and County Wicklow. Several streams flow in the area, notably the Jobstown or Tallaght Stream (a tributary of the Dodder River), and the Fettercairn Stream (a tributary of the River Camac), while the Tymon River, the main component of the River Poddle ( Liffey tributary), rises in Cookstown, near Fettercairn.