Institute of Technology, Tallaght

The institute was established as Tallaght Regional Technical College, in 1992, and was at the time the final new Regional Technical College opened in Ireland. In the words of M.B. O'Hara, a local secondary school principal, interviewed in 1992 during the buildings construction:

The Regional Technical College will open in October. It's being built at the moment and everybody's looking forward to it because we have a large young population in Tallaght. Now, it will be great for them to have an RTC on their doorstep, but I hope that it will help motivate the people in the middle who have a lot of ability but so far it's quite difficult to rouse their ambition, so I hope when they see third level life in the area that they may feel it's worthwhile putting that little bit of extra study in.

Tallaght Regional Technical College was built on lands donated for educational use to the Irish government by the Dominican Orders, St. Mary's Priory lands, in Tallaght. Qualifications were accredited by the NCEA (the forerunner to HETAC).

The institute adopted the abbreviated title of "ITT Dublin" in 2005, to differentiate it from IT Tralee; this did not change the legal name which continued to be "Institute of Technology, Tallaght" as stated in the Institutes of Technology Act, 2006. In 2016, the institute re-branded as ITT.

From 2011, IT Tallaght validated Theology degrees from The Priory Institute, located adjacent to the campus in Tallaght.

In 2013, it was announced that IT Tallaght, IT Blanchardstown and the Dublin Institute of Technology intended to apply for Technical University Status. On 1 January 2019, this Technical University was founded under the name of 'Technological University Dublin', amalgamating all three institutions.