Given persisting systemic inequities, rising white nationalism, and an increasingly diverse ethnic-racial population, there is a need for empirical research on how White youth develop anti-racist competencies during adolescence. Indicators of adolescents’ ethnic-racial identity (ERI), such as ERI negative affect and centrality may play an important role in this process and are important to examine specifically for White youth because they involve feelings and beliefs about membership in a group socially perceived to be dominant. In fact, ERI negative affect and centrality may operate as unique mechanisms through which White youth develop attitudes about interacting with different ethnic-racial groups. Accordingly, the current study used a prospective longitudinal design to test whether White youth’s (N = 1243; Mage = 16.09, SD = 1.20; 47% female, 53% male) ERI negative affect and centrality predicted their ethnic-racial intergroup contact attitudes across a school year. Multivariate path analysis indicated that higher centrality at the beginning of the school year predicted greater avoidance attitudes later in the school year, adjusting for earlier avoidance attitudes. The interaction between ERI negative affect and centrality was marginally significant in predicting later avoidance and approach attitudes. The findings suggest that ERI may function as a mechanism through which White youth develop intergroup contact attitudes.