In 1909, a 27 rank electro-pneumatic organ was built and installed by the Kimball Company of Chicago. It was rebuilt by Schoenstein of San Francisco in 1953.
By the mid 1980's, this organ had come to the end of its natural life and was replaced in 1992 by a new 77/79 rank mechanical action English-style organ built by Kenneth Jones and Associates of Bray, Ireland.
The organ, which has 4,066 pipes, stands in a Gothic case designed to match the woodwork installed in the Comes interior of 1918.
A notable element of the organ is the Fanfare Trumpet that extends from the front of the choir gallery. The organ serves both liturgical and concert purposes.
