The Legion of Mary has been known to be a "School of Saints". There could be a potential of many saints due to martyrdom, especially from countries where the Legion of Mary has been persecuted and had been called "public enemy number one" by the state/government. Many Legion of Mary members lost their lives by remaining faithful to the Catholic faith and refused to renounce their faith during persecution. The Legion of Mary remains to be faithful to our Catholic faith and under the sanction and Magisterium of the Catholic Church.

The following are only a few of the officially known Legion of Mary advocates who are on their path to sainthood.