The present research investigates the effects of social exclusion on attitudes toward ethnic and religious minorities. Native-born German participants who were socially excluded rather than included reported greater approval for stricter legislation regarding the naturalization of immigrants (Study 1), reported greater prejudice against openly observant Muslims (Studies 2 and 3), and stronger agreement with the view that immigrants are financial burdens to the state (Study 4). Social exclusion threatens the sense of personal control, which in turn leads to stronger rejection of stigmatized outgroups (Study 3). When perceived control was experimentally enhanced, the social exclusion effect disappeared (Study 4). The theoretical and practical implications of these findings are discussed.