Dundrum (Irish: Dún Droma, meaning 'the ridge fort'), originally a village in its own right, is an outer suburb of Dublin, Ireland.

The ancient name for Dundrum is "Taney" which derives from Tigh Naithi meaning the house or place of Nath Í.

The first reference to the placename of Taney occurs in the Charter of St. Laurence O'Toole to Christchurch in 1178 as "half of Rathnahi" and in the following year in a Papal bull of Pope Alexander III to the same archbishop as "Medietatem de Tignai".

The original village clustered around Dundrum Castle and was a rural defensive outpost against assaults and raids from Irish tribes and families such as the O'Tooles and the O'Byrnes.

The castle was never reoccupied and exists today as ruins overlooking the Dundrum bypass and the shopping centre.

The arrival of Richard Fitzwilliam and the building of the castle established commercial activity in the region.

It was replaced by a larger building in 1878 and marked when Dundrum was constituted a separate parish from the area previously covered by Booterstown.

The church is built in a Gothic style from Dublin granite with Portland and Bath stone used for the surrounds of windows and doors.

In the summer of 1846, Thomas Carlyle travelled from Scotland to Dundrum to spend time with his close friend Charles Gavan Duffy, one of the co-founders of Young Ireland.

Originally, the library was used as an entertainment facility for the community and the upper floor was equipped with a stage and even a kitchen.

Known as Dundrum Town Centre, it contains within the complex one of the largest cinemas in Ireland, opened in early October 2005.

Plans to redevelop the old shopping centre included proposed space for hotels, apartments and more retail outlets.

The Luas route substantially follows the original Harcourt Street railway line, which was operated by the DSER from Dublin to Bray.

The 19th-century Irish physicist George Johnstone Stoney, the first person to posit the existence of the electron, resided in Dundrum for much of his adult life.