Purgatorial societies are Roman Catholic Church associations or confraternities which aim to assist souls in purgatory reach heaven. The doctrine concerning purgatory (the term for the intermediate state in Roman Catholicism), the condition of the poor souls after death (particular judgment), the communion of saints, and the satisfactory value of our good works form the basis of these associations.

In the present day, many purgatorial societies exist, such as the Purgatorian Archconfraternity, which is run by the monks in the religious order of Transalpine Redemptorists; the Central Ohio Purgatorial Confraternity, a lay apostolate; the Saint Gertrude Purgatorian Society, which is based in the United States; and the Guild of All Souls, which is a traditionalist Catholic purgatorial society under the auspices of the Guild of St. Peter ad Vincula.