Gender identities outside of the binary of female and male are increasingly being recognized in social, legal, medical and psychological discourses together with the emerging presence and advocacy of people, who identify as non-binary or genderqueer. Population-based studies show a small percentage – but a sizable proportion in terms of numbers – of people who identify as non-binary. While such genders have always been in existence worldwide, they remain marginalized, and as such at risk of victimization and of minority stress as a result of social non-acceptance and discrimination. Non-binary and Genderqueer Genders explores these gender identities in relation to health, well-being, and/or other experiences in an effort to contribute to improving clinical standards and continued cultural change towards acceptance for this group of people. This book was originally published as a special issue of the (renamed in 2020)