Using data collected in Canada, the United States, and the United Kingdom, this article examines the determinants of attitudes toward immigrants. In particular, we draw on the literature in social psychology to explore the role of locus of control in promoting more ethnocentric and restrictive attitudes towards immigration. We conceptualize control at three levels: (1) perceptions of individual locus of control (i.e., feeling that one can control one’s own circumstances), (2) perceptions of societal control (i.e., feeling that one’s country has control over immigration), and (3) perceptions of an outgroup’s locus of control (i.e., feeling that an outgroup’s social circumstances are attributable to dispositional rather than external factors). Results show that all three measures of control are important predictors of negative attitudes toward immigrants: Those who feel in control (personally or as a society) are less hostile towards immigrants, while those who attribute negative outcomes to immigrants’ predispositions are also more hostile. Results also suggest that measures of control are related to, but distinct from, both partisanship and racial prejudice.