Valuing diversity and intergroup contact predict less prejudice and discrimination, yet their relationship deserves closer attention. The evidence suggests that valuing diversity and (interest in) intergroup contact are associated, but the directionality is not clear, and it has not been tested whether the established effects of contact come about through changes in valuing diversity. We address this in three studies. In Study 1 (N = 211), using longitudinal survey data, both positive and negative contact affected the value placed on diversity over time, while valuing diversity did not significantly predict the frequency of future contact. Studies 2 (N = 224) and 3 (N = 2,618) consequently considered valuing diversity as a mediator and showed that it mediates the relationships of intergroup contact with prejudice, behavioral intentions, and policy support. Our results increase the understanding of pathways from intergroup contact to intergroup relations and offer a lever that contact interventions can target.