The Societas Rosicruciana in Civitatibus Foederatis (Rosicrucian Society of the United States) is an independent Christian society. Admission is limited to Master Masons who are members in good standing of a regular and duly constituted Masonic Lodge and who accept and believe in the fundamental principles of the Trinitarian Christian faith. It was formed on September 21, 1880, by three Colleges chartered within the previous ten months by the Society in Scotland. The Ohio College was chartered in 1997.

The purpose of the society, according to its earliest scholars, is "to afford mutual aid and encouragement in working out the great problems of Life, and in discovering the Secrets of Nature; to facilitate the study of the systems of philosophy inculcated by the original Fratres Rosae Crucis of Germany based upon the Kabbalah and the doctrines of Hermes Trismegistus."

The Societas Rosicruciana does not constitute just another interesting degree in Freemasonry, to be acquired in the course of ordinary Masonic progress. It is something beyond and outside Freemasonry. The Society is the ideal forum for Masons who wish to extend their contemplation of the hidden mysteries of Nature and Science, and to investigate the meaning and symbolism of all that now remains of the wisdom, art and literature of the Ancient World.