Reifenstein may refer to:

• Reifenstein Abbey, a Cistercian abbey near the present village of Kleinbartloff, Germany
• Reifenstein Castle, a castle in Freienfeld, northern Italy
• Burgruine Reifenstein, a castle in Styria, Austria
• Androgen insensitivity syndrome, or Reifenstein syndrome, a set of disorders of sex development

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