Immaculate Conception School was established in 1924.  The first religious order to operate the school was the Sisters of the Blessed Sacrament.  Next, from 1939 to 1979, Immaculate Conception School was under the guidance of the School Sisters of Notre Dame. Immaculate Conception School was administered by the Salesian Sisters of St. John Bosco from 1979 until 2017. In the fall of 2017, Mrs. Kim DiMarco became the school's first lay principal. From its establishment, Immaculate Conception School has strived to provide an effective Catholic educational foundation for the children of  Marrero and the surrounding areas.

By the shores of Old Man River lie the Halls of I.C.S. 
Our dear ALMA MATER you will always be the place our hearts love best. 
All our days we fondly will remember you wherever our path may lead. 
And the Holy Spirit will remain in us, for you have sown the seed. 
There are Angels all around us, even as we play. 
Mother Mary watches on, she guides us on our way. 
Love and kindness, you have taught us well, loyal, and true we'll be; 
Dear Ole Alma Mater we call I.C.S., 
Our hearts belong to thee.

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