The cornerstone of Saint Aloysius Elementary Academy was laid by the first pastor, Reverend John A. Sullivan, on October 17, 1897. The first building was a combination church/school, located on the corner of Belmont and West Side Avenues. The building housed 194 elementary school children, taught by the Sisters of Charity of Saint Elizabeth, whose principal was Sister Cecilia Agnes.
When the Hudson County Park Commission wanted an entry to Lincoln Park on West Side Avenue in 1905, it purchased the property that the building stood on. The Academy building was moved to its present site on West Side and Kensington Avenues. In 1924, due to increasing enrollment and the creation of the parish high school, a second school building opened across the street. At that time, the original Academy building was dubbed the 'Little School' and the new building was know as the 'Big School. From September of 1924 to June of 2007, the Academy's classes were held in both buildings. As of September 2007, classes stopped being offered in the 'Little School' and the 'Big School' became the official home of Saint Aloysius Elementary Academy.
Today the Elementary Academy still shows the same enthusiasm and progress that it has shown throughout the years. Things have changed in the surrounding environment, but the spirit of Saint Aloysius continues through the children who attend this Academy.