Recent years have seen considerable interest in consensual non-monogamy from both public and academic perspectives. At least 5% of the North American population is currently in a consensually non-monogamous relationship of some form and there is little difference in measures of relationship quality compared to monogamous relationships. Despite increasing levels of understanding and engagement many practitioners of consensual non-monogamy still experience stigma (and minority stress) which is exacerbated by context (e.g. parenting, healthcare settings), type of consensual non-monogamy (e.g. polyamory vs swinging) and intersects with other identities (e.g. race, sexuality). This review outlines what is currently understood about consensual non-monogamy and argues that relationship diversity has a place alongside gender and sexuality when studying sexual behaviours, romantic relationships, and well-being.