Immaculate Conception School opened its doors on September 12th, 1938 to accommodate 235 pupils in grades one to five. From the outset ICS has been staffed by the Congregation of Saint Joseph of Brentwood. Sister Mary Osmund was the first principal.

In October 1949, the enlargement of the building began. This included the cafeteria and auditorium.

The present dedicated faculty of religious Sisters and lay men and women holds masters and bachelors degrees in the field of education and other disciplines. Ms. Dorothea Y. Breen is the current principal.

As an integral part of Immaculate Conception Parish, which is staffed by the Passionist Congregation of priests, the school is a local landmark in the Jamaica Estates area. Presently, ICS serves 450 students from pre-kindergarten through eighth grade. ICS is justly proud of its graduates, many of whom have become professionals and leaders in this and other communities.