This study examines the effects of two interethnic ideologies (assimilation and multiculturalism) on in-group favoritism and discrimination intention toward immigrants. Specifically, this study aims to test the concomitant impact of these two ideologies on intergroup biases in order to affirm whether these two paths are related to intergroup bias. Moreover, this study is designed to extend previous work that found relationships between interethnic ideologies and in-group favoritism to discrimination intention. Graduate students in management programs (N = 182) answered a questionnaire. The findings show that both interethnic ideologies are concomitantly related to in-group favoritism. In particular, while assimilation is positively related to in-group favoritism, multiculturalism is negatively related to in-group favoritism. Additionally, it shows evidence of indirect relationships between interethnic ideologies and the discrimination intention through in-group favoritism. The results are discussed in light of interethnic ideologies literature and presents directions for future research.