Helias High School opened for the 1956-57 school year. The school became necessary when St. Peter High School, which previously served the community, reached capacity. Named after the Jesuit missionary
Ferdinand Helias, the institution was staffed by the De La Salle Christian Brothers, the School Sisters of Notre Dame, diocesan priests and lay members of the Catholic Church. Until 1969, Helias was co-institutional, meaning that the boys and girls had separate classes. James L. Rackers was the first layman to direct a Catholic school in Missouri after being named principal in 1971. In 2010, Helias High School changed its name to
Helias Catholic. == Staff misconduct ==