List of BDSM organizations

This is a list of educational, campaigning and community organizations related to BDSM.
Where an organization clearly indicates on its website that membership is restricted by gender or sexual orientation, this is noted. "Pansexual" in this context means that no such restrictions apply. Note, however, that many BDSM organizations of the social/community variety will require prospective members to attend an "orientation" meeting, where among other things, the organizers will attempt to screen out the obviously mentally ill and those whose interest in BDSM is professional (for example as journalists or law enforcement personnel) rather than personal.