Past research consistently suggests that single people (i.e. singles) are stigmatized, but do they constitute a stigmatized ‘group’? The current research will provide deeper insight into the stigmatization and well-being of singles by understanding the ‘group-y’ nature of singles, and how identification with groups and perceptions of groups map onto discrimination and prejudice. Study 1 will examine the extent to which singles identify as part of a group. Participants will be assigned a novel minimal group identity and then complete measures of group identification for four distinct group memberships (e.g., minimal group, relationship status, sexual orientation, nationality). We hypothesize that single participants' identification with their single group will be lower compared to other identities—including partnered people—although a smaller subset of singles may identify strongly with other singles. We also hypothesize that singles in general will perceive less discrimination towards singles relative to other aspects of their identity. In contrast, Study 2 will examine the extent to which singles are perceived as a group and the extent to which they are perceived as being responsible for their group membership. Participants will complete measures of entitativity and perceptions of responsibility for similar outgroup identities as in Study 1 (e.g., single people or people in romantic relationships, sexual or asexual people, etc.). We hypothesize that singles will be rated lower in entitativity than people in romantic relationships and other groups, yet rated higher in responsibility than other groups. Moreover, we hypothesize that prejudice towards singles will be more acceptable than prejudice towards other groups. Throughout both studies, we will use Bayesian sequential analyses in order to efficiently acquire evidence in favor or against our experimental hypotheses. We discuss the importance of group-based theoretical perspectives for understanding the current and future stigmatization and well-being of singles.