Tá dhá chór scoile againn, cór sóisearach agus cór sinsearach.
Is cór nua-aimseartha é an cór Sóisearach, a bhíonn ag obair ar amhráin éagsúla ón bpopcheol go ceol traidisiúnta go hamhráin ó cheoldrámaí. Buaileann an cór sóisearach Dé Máirt ag am lóin, ó 12:50 go 1:30 sa léachtlann.
Is cór measctha idir Choláiste Íosagáin agus Choláiste Eoin é an cór Sinsearach, a bhíonn ag obair ar amhráin i gceithre nó i dtrí pháirt den chuid is mó. Buaileann an cór Sinsearach ar an gCéadaoin ag am lóin, ó 12:10 go 12:50 sa léachtlann.
We have two school choirs, a junior choir and a senior choir.
The Junior Choir is a modern choir, working on a variety of songs ranging from pop music to traditional music to songs from musicals. The junior choir meets on Tuesdays at lunchtime, from 12:50 to 1:30 in the lecture hall.
The Senior Choir is a mixed choir between Coláiste Íosagáin and Coláiste Eoin, mostly working on songs in three or four parts. The senior choir meets on Wednesdays at lunchtime, from 12:10 to 12:50 in the lecture hall.