The Societas Rosicruciana (or Rosicrucian Society) is a Rosicrucian order which limits its membership to Christian Master Masons. The order was founded in Scotland, but now exists in England, Scotland, Canada, France, Portugal, Romania, and the United States. While a prospective member must be a Trinitarian Christian Master Mason in good standing with a Grand Lodge that is recognized by the Grand Lodge of the jurisdiction in which the Society meets, the various Societies have no other Masonic links, ties, or official recognition.

Additionally, in some jurisdictions, membership is by invitation only. As the Society offers assistance to all its members in working out the great problems of nature and science, it functions in some respects as a research society.