The name Doon, deriving from the common Irish place name term Dún meaning "fort", can also be found as the name of various different townlands in Ireland.

Dún means fortification and the Ordnance Survey map of the area records eight ring forts.

In 2003, the Placename Commission recommended that the official translation for Doon be changed to An Dún as it "was the appropriate Irish name for the village".

The Minister for Community, Rural and Gaeltacht Affairs, Eamon O'Cuiv, approved the reversion saying that the alternative Dún Bleisce had an "attested historical basis".

In 1867 the Archbishop of Cashel visited the Convent (the Parish Priest's house) and gave the Sister's permission to build a school.

The children were taught religion, English reading and writing, instrumental music and singing and crafts such as embroidery and painting.

Secondary School choirs won the National Trophy, the Pigott Cup, three times in succession in the early 1960s.

St. Fintan's CBS finally closed its doors in June 2013 following the amalgamation of St. Fintans Christian Brothers School (ERST), St Michael's College, Cappamore (County Limerick VEC) and St Joseph's Mercy Secondary School (CEIST).

The construction company BAM commenced building works on a 15-acre site donated by the Mercy Congregation, at Liscaugh, Doon, County Limerick.

The "Turning of the Sod" for the new school called Scoil na Trionóide Naofa, took place on the green field site at Doon, County Limerick on Tuesday 11 December 2012.

A river of mud flowed down the hill carrying much debris including tree trunks, boulders and railway sleepers.

In their fifth final, the team won the Limerick Senior Hurling Championship for the first time, in 2024, beating Na Piarsigh.

[8][9][10] In 1973, a Doon player, Willie Moore, played corner-back in the Limerick team which beat Kilkenny to win the all-Ireland hurling final and Jim O'Donnell was on the substitutes bench.

The carved statues, inside the gate house, are particularly fine and unusual features, representing Bacchus, Venus and Athene.