Opening in 1882, St. Charles Academy staffed by the Sisters Marinates of the Holy Cross served as the center of Catholic education for Calcasieu Parish.  In 1949, the pastor of Immaculate Conception Parish undertook the building of the parochial grade school and opened Immaculate Conception School.  In 1950, ICCS was built to serve 1^st through 8^th grades.  

Within the past five years, Immaculate Conception Cathedral School has experienced a consistent growth in enrollment.  The 2009-2010 school year enrollment is currently over 400 students.  This steady growth and the addition of Pre-Kindergarten and Kindergarten has brought about the need for changes to our existing facility to better accommodate the   educational requirements of our students and faculty. This addition will allow us to  maintain two sections of each grade.