Patriotism and threat have been shown to predict immigration attitudes. We suggest that patriotism is influential in producing threat, and such threat drives anti-immigration attitudes, but this relationship is different for Whites and Latinos. All participants completed a patriotism scale (blind and constructive patriotism measures), a threat scale (realistic and symbolic threat), and anti-immigration attitude scale. Latinos showed lower blind patriotism, realistic threat, symbolic threat, and anti-immigration attitudes compared to Whites, with no differences in constructive patriotism. Threat partially mediated the relationship between blind patriotism and anti-immigration attitudes for Whites and fully mediated the relationship for Latinos. Threat partially mediated the relationship for cultural patriotism and anti-immigration attitude for Whites but not for Latinos. Implications for public policy and education concerning immigrant attitudes are discussed.