In 2017, hundreds of thousands of Rohingya fled Myanmar and settled in the camps in Cox’s Bazar, Bangladesh. The scale of displacement brought obvious changes to their living conditions and changed family dynamics in the camps. One such change has been the increase in the practice of polygamy. Legal frameworks prevented the widespread practice of polygamy among the Rohingya in Myanmar. On the other hand, based on recent reports by NGOs and UN agencies operating in the response, the practice has been increasing over the past four years in the camps. Some reasons behind the increase include changes that resulted from the sudden movement to Bangladesh, such as economic factors, gender norms, and the legal frameworks and rules and regulations applicable in the camps. In the Rohingya refugee camps, where protection concerns are already very high, the increase in polygamy likely contributes to aggravating different forms of sexual and gender-based violence.