Established in 1904 by the Sisters of St. Joseph (CSJ), and basing their educational mission on CSJ principles, St. Joseph High School is located within the Roman Catholic Diocese of Brooklyn.

[1] Sisters of St. Joseph (CSJ) Schools are Catholic college-preparatory educational communities.

In the beginning, SJHS provided a two-year commercial curriculum to the daughters of immigrants and the working class.

In 1936, SJHS became a four-year high school, and in 1965 it adopted a college preparatory curriculum.

They may also take electives in Fine Arts, Business, Mathematics, Psychology, Science Research, Journalism and Yearbook.