In this study the differences in ecumenical worldview development are examined by race for 3,300 college students from 135 institutions. Results indicate that all students exhibited significant growth through college in ecumenical worldview, and students of color (Black, Asian, and Latino students) exhibited significantly higher levels of ecumenical worldview than White students. Prosocial involvement experiences that significantly predicted ecumenical worldview for at least 2 groups in the study were leadership training, activism, and political campaigning. These findings point to the importance of prosocial cocurricular experiences in contributing to ecumenical worldview development.