The stained glass for the windows was supplied by messrs. Wiles of Newcastle in England. The windows vary in shape and size from the narrow pointed type (neo-Gothic) to the rose shaped-windows. The window shapes incorporate limestone tracery. The names of a number of people who contributed to the construction of the church can be seen on some of the windows. For example, the stained glass window behind the statue of Mary was donated by Barry McMullen, and reads: "Pray for Barry McMullen Builder of the church". Others read: "Pray for George Goldie Architect of this church" and "Pray for the very Rev David Horgan of Cork, Priest of Ballincollig who erected the church with help of his parishioners and all the faithful- A.D. 1866".