Empirical research on the determinants of individual-level support for trade liberalization has focused almost entirely on the economic effects of trade. Yet, international relations scholarship has long recognized that commerce also has a variety of security implications. This paper explores if and when security considerations influence individual attitudes toward trade. In this study, we ask two questions: First, to what extent do expectations about the security implications of trade affect individual-level attitudes toward trade agreements? Second, does the introduction of security concerns into the discussion of trade agreements influence how heavily individuals weigh their economic costs and benefits? We employ an original experiment embedded in a conjoint survey to investigate the relative impact of a variety of economic and security considerations on respondents’ support for trade. Our findings suggest that security information matters and undermines the appeal of some, though not all, economic arguments for trade liberalization among our respondents.