Valuing diversity and intergroup contact predict less prejudice and discrimination, yet their relationship deserves closer attention. There is some evidence that valuing diversity and intergroup contact are associated, but it has not been tested whether the established effects of contact come about through changes in valuing diversity. We address this in two studies (total N = 2835) that consider valuing diversity as a mediator of intergroup contact. They show that valuing diversity mediates the relationships of intergroup contact with prejudice, bystander intervention intentions, policy support and approach intentions. Our results increase the understanding of pathways from intergroup contact to intergroup relations and offer a lever that contact interventions can target.