--- - |2 Abstract We apply a model of interpersonal attachment style to the group domain, examining how attachment to ingroups relates to self‐views, group esteem, and ingroup investment. In Study 1 (N = 306), participants completed measures of self‐esteem, group esteem, group attachment insecurity, and investment. Study 2 (N = 316) implemented a within‐subjects experimental design in which participants completed the same measures as in Study 1 with regard to ingroups they held in high versus low esteem. In both studies, the negative relationship between group esteem and group attachment avoidance was stronger among participants with higher self‐esteem, and the negative relationship between self‐esteem and group attachment anxiety was stronger for more esteemed ingroups. Over and above group esteem, group attachment anxiety was positively and avoidance negatively related to investment in ingroups. We integrated frameworks spanning group dynamics and close relationships to contribute to a more comprehensive understanding of how individuals perceive their relationships with ingroups. - European Journal of Social Psychology, EarlyView.